Suppose you want to construct a 99% confidence interval for the mean number of seconds that people spend brushing their teeth. You want a margin of error of no more than plus or minus 2 seconds and know that the standard deviation is 21 seconds. At least how many people must you observe?

(Walking blindfolded on a tight rope!) When using Euler's method, we need to draw the tangent line at each step in order to see where we will be walking during this step. This statement is True

When using Euler's method, we need to draw the tangent line at each step in order to see where we will be walking during this step. This is because Euler's method is based on the idea of approximating the solution to an ODE by walking along tangent lines of nearby solutions for short periods of time.

At each time step, we first calculate the slope of the tangent line to the solution at that point. This slope is then used to estimate the change in the solution over a small time step. We take a small step along the tangent line using this estimate to get a new point on the solution curve.

To visualize this process, we can draw the tangent line at each point and take a small step along it to see where the solution curve will be at the next time step. This is like walking along a tightrope while blindfolded - we need to be able to feel our way along the rope by sensing the slope of the rope at each step.

In summary, drawing the tangent line at each step is an essential part of using Euler's method to approximate solutions to ODEs. It allows us to visualize the approximation process and see where we will be walking on the solution curve at each time step.

To learn more about blindfolded visit:

https://brainly.com/question/7220444

#SPJ11

A. According to the question, Z = -2.47 is  the value of the Z-statistic for this test.

The Z-statistic is a measure of the difference between a sample statistic and a population parameter, expressed in standard deviation units. It is used to test hypotheses about population parameters and to compare sample means to the population mean. The Z-statistic is calculated by subtracting the population mean from the sample mean and then dividing the result by the standard error of the sample mean.

a. z = (0.42 - 0.50) / √(0.50×(1-0.50) / 200)

z = -2.47

b. The absolute value of z for the original is the same as for the revised test because the numerator of the z-statistic is the same, since the difference between the hypothesized mean and the sample mean is the same, regardless of the hypothesized mean. Thus, the absolute value of z is the same in both tests.

To learn more about Z-statistic

https://brainly.com/question/28810342

#SPJ1

The variance of the distribution is 1.59375, which indicates the level of uncertainty associated with the actual rate of cleanser pumped by the machine.

The variance of a distribution is a measure of how spread out the values are from the mean. In this case, the uniform distribution over the interval 9 to 13.5 can be represented by the following probability density function:

f(x) = 1/(13.5 - 9) = 1/4.5, for 9 ≤ x ≤ 13.5

where x represents the rate of cleanser pumped by the machine.

To find the variance, we need to first find the mean or expected value of the distribution. The expected value of a uniform distribution over an interval [a, b] is given by:

E(x) = (a + b)/2

Therefore, in this case, the expected value of the distribution is:

E(x) = (9 + 13.5)/2 = 11.25

Next, we can use the formula for variance to find the spread of the distribution:

Var(x) = ∫(x - E(x))² x f(x) dx, for a ≤ x ≤ b

where f(x) is the probability density function of the distribution.

Substituting the values, we get:

Var(x) = ∫(x - 11.25)² x (1/4.5) dx, for 9 ≤ x ≤ 13.5

Simplifying the expression, we get:

Var(x) = [(x - 11.25)³ / (3 x 4.5)] from 9 to 13.5

= (1/3 x 4.5) x [(13.5 - 11.25)³ - (9 - 11.25)³]

= (1/3 x 4.5) x [(2.25)³ - (-2.25)³]

= (1/3 x 4.5) x (11.390625 - (-11.390625))

= (1/3 x 4.5) x (22.78125)

= 1.59375

To know more about variance here

https://brainly.com/question/22365883

#SPJ4

Magnetic field must be in YZ plane except in negative and positive Z direction.

Explanation:

Here loop is in XY plane and current direction as defined then its magnetic moment is in negative Z direction.

So to rotate loop about X axis force should be in plane YZ.

Thus torque produced by this magnetic force is in direction of X axis.

Now we know torque on a loop is calculated by

Torque=magnetic moment × B (vector cross product)(Here B is magnetic field)

Thus magnetic field can be in  the positive and negative Y direction and Z direction.

learn more on magnetic field click:

https://brainly.com/question/15864931

#SPJ4

complete question:

A current loop lies in the xy plane of an xyz coordinate system, with the current circulating counterclockwise when viewed looking down the positive z axis toward the origin. The loop experiences a torque about the x axis that is counterclockwise when viewed looking down the positive x axis toward the origin. Part A Describe the direction of the uniform external magnetic field responsible for this torque. Describe the direction of the uniform external magnetic field responsible for this torque. The magnetic field is in the positive y direction. The magnetic field is in the negative x direction. The magnetic field is in the positive x direction. The magnetic field is in the negative y direction. The magnetic field is in the positive z direction. The magnetic field is in the negative z direction. Request Answer

To solve this problem, we need to use the standard deviation and the concept of normal distribution.

(a) To find the maximum score of the lowest 15%, we need to find the score at which only 15% of the students scored lower. We can use a z-score table to find the corresponding z-score.

First, we calculate the z-score for the mean of 9.3:

z = (x - μ) / σ
z = (0 - 9.3) / 1.6
z = -5.81

Next, we use the z-score table to find the area to the left of z = -5.81, which is approximately 0.

Since we want the lowest 15%, we need to find the score that corresponds to the area to the right of 0.15 (1 - 0.15 = 0.85).

Using the z-score table again, we find that the corresponding z-score is approximately 1.04.

Now we can solve for x:

1.04 = (x - 9.3) / 1.6
x = 11.0

Therefore, the maximum score of the lowest 15% is 11.

(b) To find the minimum score of the highest 85%, we can use the same approach as before.

First, we need to find the z-score for the mean of 9.3:

z = (x - μ) / σ
z = (0 - 9.3) / 1.6
z = -5.81

Next, we use the z-score table to find the area to the left of z = -5.81, which is approximately 0.

Since we want the highest 85%, we need to find the score that corresponds to the area to the right of 0.85.

Using the z-score table again, we find that the corresponding z-score is approximately 1.04 (we could also use the table to find the z-score that corresponds to 0.15 and then subtract it from 0).

Now we can solve for x:

1.04 = (x - 9.3) / 1.6
x = 10.68

Therefore, the minimum score of the highest 85% is 11.

Learn more about it here:

brainly.com/question/31581942

#SPJ11

Using the given information, the values of the trigonometrical ratios are:

sin(θ) = 12/13

cos(θ) = 5/13

sec(θ) = 13/5

From the question, we are to determine the value of the given trigonometrical ratios

From the given information, we have that

tan(θ) = 12/5

From SOH CAH TOA,

We know that

sin(θ) = Opposite / Hypotenuse

cos(θ) = Adjacent / Hypotenuse

tan(θ) = Opposite / Adjacent

Thus,

We can create a right triangle such that the opposite side is 12 and the adjacent is 5

Using the Pythagorean's theorem, we can find the hypotenuse

|Hyp|² = |Opp|² + |Adj|²

|Hyp|² = 12² + 5²

|Hyp|² = 144 + 25

|Hyp|² = 169

|Hyp| = √169

|Hyp| = 13

Now,

Also from SOH CAH TOA

We can write that

sin(θ) = 12/13

cos(θ) = 5/13

But sec(θ) = 1/cos(θ)

Thus,

sec(θ) = 13/5

Learn more on Trigonometrical ratios here: https://brainly.com/question/29529495

#SPJ1

a) The probability that 11 or more of 30,000 healthy patients would slip into comas during routine anesthesia's is 0.1%

b) The conclusion would you draw about the hospital's medical practices regarding anesthesia is the hospital's medical practices regarding anesthesia may be suboptimal or inadequate, and further investigation may be necessary to identify the cause and improve patient safety.

a) To apply the Poisson distribution, we need to calculate the expected number of events, which is μ = np, where n is the sample size and p is the probability of the event occurring in one trial. In this case, n = 30,000 and p = 6/80,000, so μ = 30,000 x (6/80,000) = 2.2.

The probability of having 11 or more comas can then be approximated using the Poisson distribution formula:

P(X ≥ 11) = 1 - P(X ≤ 10) ≈ 1 - ∑(k=0 to 10) [tex][e^{-\mu} \times \mu^k / k!)][/tex]

where X is the number of comas, and the symbol ≈ means "approximately equal to."

Using a calculator or statistical software, we can compute this probability to be approximately 0.001, or 0.1%.

b) With a probability of 0.1%, it is highly unlikely that 11 or more healthy patients out of 30,000 would slip into comas during routine anesthesia if the true average rate is 6 in 80,000.

To know more about probability here

https://brainly.com/question/11234923

#SPJ4

The volume of cube A is 123 m³.

A cube is a three-dimensional solid object with six square faces, all of which are congruent to each other, and each pair of adjacent faces meet at a right angle. In other words, a cube is a regular polyhedron with six congruent square faces. The cube is a special case of a rectangular parallelepiped, where all the edges have the same length.

In mathematics, preimage refers to the set of all elements in the domain of a function that map to a specific element in the range of the function. More specifically, if f is a function from a set A to a set B, and y is an element of B, then the preimage of y under f is the set of all elements in A that map to y. The preimage of y is denoted by f⁻¹(y), where f⁻¹ represents the inverse image or preimage operator.

Use the formula for the relationship between the volumes of similar figures under dilation:

(Volume of Image) = (Scale Factor)³ ×(Volume of Preimage)

In this case, cube B is the image and cube A is the preimage, and the scale factor is 4. Let Vₙ be the volume of cube A. Then we have:

7872 = 4³ × Vₙ

Simplifying, we get:

Vₙ = 7872 / 64 = 123

Therefore, the volume of cube A is 123 m³.

Learn more about volume here:

https://brainly.com/question/1578538

#SPJ1

Answer:

8cm!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

The equation of the tangent plane to the surface z = 36/4x+5y

at the point (4,4,1) is z = (-9/16)x - (9/20)y + 61/20.

We need to find the partial derivatives of the surface with respect to x

and y, evaluated at the point (4,4):

∂z/∂x = -36/16[tex]x^2[/tex] = -9/[tex]x^2[/tex]

∂z/∂y = -36/5[tex]y^2[/tex]

Evaluating at (4,4), we get:

∂z/∂x(4,4) = -9/16

∂z/∂y(4,4) = -36/80 = -9/20

The equation of the tangent plane is given by:

z - z0 = ∂z/∂x(x0,y0)(x - x0) + ∂z/∂y(x0,y0)(y - y0)

where (x0,y0,z0) is the point of tangency, which is (4,4,1).

Substituting the values we obtained, we get:

z - 1 = (-9/16)(x - 4) + (-9/20)(y - 4)

Simplifying, we get:

z = (-9/16)x - (9/20)y + 61/20

Therefore, the equation of the tangent plane to the surface z = 36/4x+5y

at the point (4,4,1) is z = (-9/16)x - (9/20)y + 61/20.

for such more question on  tangent plane

https://brainly.com/question/19132778

#SPJ11

a) As of 2/25/22, approximately 21.6% of California's population has been infected with Covid-19 since the pandemic began.

b) Of those infected, about 0.99% of Californians died from the coronavirus as of 2/25/22 since the pandemic began.


a) To find the percentage of infected individuals, divide the number of infected people (8,577,217) by the total population (39.7 million) and multiply by 100: (8,577,217 / 39,700,000) x 100 = 21.6%.

b) To find the percentage of deaths among infected individuals, divide the number of deaths (85,029) by the number of infected people (8,577,217) and multiply by 100: (85,029 / 8,577,217) x 100 = 0.99%.

To know more about Covid-19 click on below link:

https://brainly.com/question/30975256#

#SPJ11

Answer:

C

Step-by-step explanation:

Based on the given statements, we know that only one person is telling the truth. Let's examine each statement:

María says it was Pedro. If this statement were true, then Pedro would also be telling the truth when he says it was Ricardo. But we know only one person is telling the truth, so this statement cannot be true.

Pedro says it was Ricardo. If this statement were true, then Ricardo's statement would be a lie, which means he must be the one who broke the window. However, Pedro's statement cannot be true because we already know only one person is telling the truth.

Ricardo says it wasn't him. If this statement were true, then either María or Pedro must be telling the truth. But as we already know, neither of their statements are true.

Tina says it wasn't her. This statement is inconclusive, as Tina could either be telling the truth or lying.

Therefore, the only option left is that the one who broke the window is C) Pedro.

The one who broke the window is Pedro, the correct option is C

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value. Unitary method is a technique by which we find the value of a single unit from the value of multiple devices and the value of more than one unit from the value of a single unit. It is a method that we use for most of the calculations in math.

We are given that;

The statements

Now,

To find out which one is correct, we need to look for contradictions or inconsistencies in the statements.

If María broke the window, then she lied and Pedro told the truth. But this contradicts the fact that only one child told the truth.

If Ricardo broke the window, then he lied and Pedro told the truth. But this also contradicts the fact that only one child told the truth.

If Tina broke the window, then she lied and Ricardo told the truth. But this also contradicts the fact that only one child told the truth.

The only scenario that does not contradict the fact that only one child told the truth is if Pedro broke the window. Then María told the truth and Pedro, Ricardo and Tina lied.

Therefore, by unitary method the answer will be Pedro.

Learn more about the unitary method, please visit the link given below;

https://brainly.com/question/23423168

#SPJ2

The Maclaurin series for the function f(x) = arctan(3x²) / x is:

[tex]f(x) = 3x - 9x^{5/3} + 243x^{9/5} - 6561x^{13/7} + ...[/tex]

The Maclaurin series for the function f(x) = arctan(3x²) / x.

To do this, we will use the Maclaurin series of arctan(u), which is given by:

[tex]arctan(u) = u - (u^3)/3 + (u^5)/5 - (u^7)/7 + ...[/tex]

Now, let's find the Maclaurin series for f(x) = arctan(3x²) / x by substituting u = 3x²:

[tex]f(x) = (arctan(3x²)) / x = [(3x²) - (3x²)^3/3 + (3x²)^5/5 - (3x²)^7/7 + ...] / x[/tex]

Now, simplify the series by dividing each term by x:

[tex]f(x) = 3x - 9x^5/3 + 243x^9/5 - 6561x^13/7 + ...[/tex]

So, the Maclaurin series for the function f(x) = arctan(3x²) / x is:

[tex]f(x) = 3x - 9x^{5/3} + 243x^{9/5} - 6561x^{13/7} + ...[/tex]

for such more question on  Maclaurin series

https://brainly.com/question/7846182

#SPJ11

Answer :

It is given that A Triangle has one angle that measures 64 degrees, one angle that measures 42 degrees, and one angle that measures 74 degrees.

So,

Types of angles :

Right angle :

Acute angle :

Obtuse angle :

Straight angle :

Reflex angle :

Full angle :

In the given question, No angle measures more than 180° and no angle is 90°.

But there is angle which measures less than 90°.

Therefore, It is a kind of acute traingle.

Answer:

Use the pythagreaom theorem formula

Step-by-step explanation:

It will tell you the steps so you put 13 as the a leg and your solving for the B leg so make sure to pick that and your hypotunuse is 56.

From the total amount of $8000, $3000 was invested at 3% interest rate and $5000 was invested at 5% interest rate.

We are required to determine how much of $8,000 was invested at each account with 3% and 7% annual interest rate.

1. Let x be the amount invested at 3% and (8000 - x) be the amount invested at 7%.

2. The total interest earned for the year is $440.

3. Write an equation for the total interest:

0.03x + 0.07(8000 - x) = 440.

4. Solve for x:

0.03x + 560 - 0.07x = 440

-0.04x = -120

x = 3000

So, $3000 was invested at 3%

5. Subtract $3000 from $8000:

8000 - 3000 = 5000

So, $5000 was invested at 7%.

Learn more about Interest rate:

https://brainly.com/question/29415701

#SPJ11

The statement first, third, and fifth are correct because the range of a function [-1, ∞), and the Axis of symmetry is x = 3.

It is described as a particular kind of relationship, and each value in the domain is associated to exactly one value in the range according to the function. They have a predefined domain and range.

We serve a purpose:

f(x) = (x – 3) ² – 1

The domain of a quadratic function is (-∞, ∞)

The range of a function [-1, ∞)

The function decreases over the interval (-∞, 3)

The Axis of symmetry is x = 3

The vertex is at (3, -1)

Thus, the statement first, third, and fifth are correct because the range of a function [-1, ∞), and the Axis of symmetry is x = 3.

To know more about function, visit:

brainly.com/question/5245372

#SPJ1

There are 24 different ways to arrange the cards in the boxes.

How to arrange the card in the box?

Because there are four boxes and four cards, there are four ways to arrange the first card, three ways to arrange the second card (because one box is already occupied), two ways to arrange the third card, and one method to arrange the fourth card. As a result, the total number of possible ways to arrange the cards in the boxes is:

4 x 3 x 2 x 1 = 24

So there are 24 different ways to arrange the cards in the boxes.

Learn more about cards here:

https://brainly.com/question/7570270

#SPJ1

The volume of the two objects pyramid and cylinder are not same hence, Jude's calculations are not correct.

There are two ways to approximate a number to a specific number of digits or decimal places: rounding and truncating. When a number is rounded, the value is adjusted to the value that is closest while still maintaining the desired level of accuracy. To round the number 3.14159 to two decimal places, for instance, we would start with the third decimal place, which is 1, and round up or down depending on whether the next digit is 5 or less. 3.14 is the result of rounding 3.14159 to two decimal points.

On the other hand, truncating only entails removing the digits that exceed the specified level of accuracy.

The volume of the square pyramid is given as:

Volume of pyramid = (1/3) x Base area x Height

For base edge = 12 and height = 10:

for the base are we have:

Base area = 12 (12) = 144 sq, in.

Now, substituting the values we have:

Volume of pyramid = (1/3) x 144 sq. in. x 10 in. = 480 cu. in.

The volume of cylinder is given as:

Volume of cylinder = π x r² x h

Now,

Volume of cylinder = 3.14 x 6.77² sq. in. x 10 in. = 1443 cu. in.

The volume of the two objects are not same hence, Jude's calculations are not correct.

Learn more about volume here:

https://brainly.com/question/24086520

#SPJ1

There can be 90% confident that the population mean salary of college graduates who took a statistics course is between $60,947.78 and $66,652.22.

To construct a 90% confidence interval for estimating the population means μ of salaries for college graduates who took a statistics course, we can use the formula:

Confidence interval = sample mean ± (critical value) x (standard error)

First, we need to find the critical value from the t-distribution table with a degree of freedom of n-1. Since we have 49 college graduates, our degrees of freedom are 48. Looking at the table, the critical value for a 90% confidence level is 1.677.

Next, we need to find the standard error, which is calculated by dividing the standard deviation by the square root of the sample size. In this case, the standard error is $11,936/sqrt(49) = $1703.05.

Substituting these values into the formula, we get:

Confidence interval = $63,800 ± 1.677 x $1703.05
Confidence interval = $63,800 ± $2852.22

To learn more about Population :

https://brainly.com/question/25630111

#SPJ11

The area of the region enclosed by the curves y=x² and y=|x| is 1/2 square units.

To begin, we need to visualize the two curves on the coordinate plane. The first curve y=x² is a parabolic function that opens upwards and passes through the origin. The second curve y=|x| is a V-shaped function that opens upwards and passes through the origin as well.

The integral for the left part of the curve (from -1 to 0) is:

∫(-1 to 0) [x²-(-x)]dx

which simplifies to:

∫(-1 to 0) (x²+x)dx

Integrating this expression gives us:

[x^3/3 + x²/2] from -1 to 0

Substituting the limits of integration gives us:

(0-(-1/3)) + (0-0) = 1/3

Thus, the area enclosed by the curves y=x² and y=|x| from -1 to 0 is 1/3 square units.

The integral for the right part of the curve (from 0 to 1) is:

∫(0 to 1) [x²-(x)]dx

which simplifies to:

∫(0 to 1) (x²-x)dx

Integrating this expression gives us:

[x^3/3 - x²/2] from 0 to 1

Substituting the limits of integration gives us:

(1/3-(1/2)) + (0-0) = -1/6

Thus, the area enclosed by the curves y=x² and y=|x| from 0 to 1 is 1/6 square units.

Finally, to get the total area, we add the areas from both parts:

1/3 + 1/6 = 1/2

To know more about area here

https://brainly.com/question/14994710

#SPJ4

The Loan Amount = $6000 * (1 - 0.05) * 50 = $285,000

For Bank A, the initial deposit, money multiplier, reserve rate, and total amount deposited that would make sense are:

Initial Deposit: $6000

Money Multiplier: 50

Reserve Rate: 5%

Total Amount Deposited: $100,000

Justification:

The initial deposit of $6000 is consistent with the information given in the problem statement.

The money multiplier of 50 is within the range of typical money multipliers for banks, which are typically in the range of 10-60, depending on the reserve rate.

The reserve rate of 5% is consistent with industry standards, which typically range from 0-10%.

The total amount deposited of $100,000 is consistent with the initial deposit of $6000 and the money multiplier of 50.

Given these values, we can calculate the amount loaned out by Bank A as follows:

Loan Amount = Initial Deposit * (1 - Reserve Rate) * Money Multiplier

Loan Amount = $6000 * (1 - 0.05) * 50 = $285,000

Read more about initial deposit here:

https://brainly.com/question/14757536

#SPJ1

2x - 6  is polynomial represents the length of the triangle's base .

What does a triangular response mean?

It has three straight sides and is a two-dimensional figure. As a 3-sided polygon, a triangle is included. Three triangle angles added together equal 180 degrees.

                             Three edges and three vertices make up the three sides of a triangle, which is a three-sided polygon. The fact that the interior angles of a triangle add up to 180 degrees is the most crucial aspect of triangles.

Area = 1/2 * b * h

x² + 3x— 18  = 1/2 * b * (x + 6)

  b =  2(x² + 3x— 18)/  (x + 6)

         b = 2x² + 6x - 36/x + 6

          b  = 2x - 6

Learn more about triangle's

brainly.com/question/2773823

#SPJ1

The absolute maximum is f(-3) = 7 and the absolute minimum is f(2) = 0 and the critical points is x = ln(2).

Let's apply this method to the equation f(x) = eˣ+5 + e⁻ˣ 2. To find the critical points, we need to find the derivative of the equation, which is f'(x) = eˣ - 2e⁻ˣ. Setting this derivative to zero, we get eˣ = 2e⁻ˣ. Taking the natural logarithm of both sides, we get x = ln(2/1), which simplifies to x = ln(2). Therefore, the critical point of this equation is x = ln(2).

Now let's move on to the equation f(x) = 4 – x² over the interval x € (-3,1). To find the local and absolute extrema, we need to follow a few steps.

First, we find the critical points of the equation, which we already know are x = -2 and x = 2. Next, we evaluate the function at these critical points and at the endpoints of the interval, which are f(-3) = 7, f(-2) = 0, f(1) = 3, and f(2) = 0.

Now we can determine the local and absolute extrema. Local extrema occur at critical points, so we can see that f(-2) is a local maximum and f(2) is a local minimum.

To know more about equation here

https://brainly.com/question/10413253

#SPJ4

6. Null Hypothesis is The percentage of left-handed people in the isolated  population is 10%.

Alternative Hypothesis The percentage of left-handed people in the

isolated population is different from 10%.

7. The probability of observing a test statistic less than -1.12 or

greater than 1.12.

8. The p-value is the sum of these two probabilities:

p-value = 0.1314 + 0.1314 = 0.2628.

9. Since the p-value (0.2628) is greater than the significance level (0.05), we fail to reject the null hypothesis.

10. This conclusion is based on a single sample, and it is possible

that a different sample might lead to a different conclusion.

Further studies with larger sample sizes might be necessary to

investigate this issue more thoroughly.

6. State the null and alternative hypotheses:

Null Hypothesis: The percentage of left-handed people in the isolated

population is 10%.

Alternative Hypothesis: The percentage of left-handed people in the

isolated population is different from 10%.

7. Compute the test statistic:

To compute the test statistic, we need to calculate the standard error,

which is given by the following formula:

SE = sqrt(p(1-p)/n),

where p is the proportion of left-handed people in the sample, and n is

the sample size.

In this case, p = 10/50 = 0.2 and n = 50, so

SE = sqrt(0.2 × 0.8 / 50) = 0.0894.

The test statistic is then given by:

Z = (p - P) / SE,

where P is the hypothesized proportion under the null hypothesis.

In this case, P = 0.1, so

Z = (0.2 - 0.1) / 0.0894 = 1.12.

7. Compute the p-value:

The p-value is the probability of obtaining a test statistic as extreme or

more extreme than the observed one, assuming the null hypothesis is

true. In this case, we are conducting a two-tailed test, so we need to

calculate the probability of observing a test statistic less than -1.12 or

greater than 1.12.

8. Using a standard normal distribution table or calculator, we find that the  probability of observing a test statistic less than -1.12 is 0.1314, and the probability of observing a test statistic greater than 1.12 is also 0.1314.

Therefore, the p-value is the sum of these two probabilities:

p-value = 0.1314 + 0.1314 = 0.2628.

9. State the conclusion:

Since the p-value (0.2628) is greater than the significance level (0.05), we fail to reject the null hypothesis. There is not enough evidence to suggest that the percentage of left-handed people in the isolated population is different from 10%.

10. Interpret the conclusion in the context of the problem:

Based on the sample of 50 people from the isolated tribe in the Amazon

Forest, there is not enough evidence to suggest that the percentage of

left-handed people in the population is different from 10%.

for such more question on Null Hypothesis

https://brainly.com/question/28042334

#SPJ11

The student takes 150 minutes to mow 3 lawns, which means he takes 50 minutes to mow one lawn. Therefore, the correct prediction is that it will take him 10 hours to mow 12 lawns. So, the correct answer is A).

Based on the given information, we know that the student takes 150 minutes to mow 3 lawns. Therefore, the time it takes him to mow one lawn is 50 minutes (150 divided by 3).

If the student has 12 lawns to mow, he will need to spend 12 times the time it takes him to mow one lawn.

So, the prediction is that it will take him 12 times 50 minutes, which equals 600 minutes, or 10 hours, to mow 12 lawns.

Therefore, the correct prediction is: It will take him 10 hours to mow 12 lawns. So, the correct answer is A).

To know more about mows lawns:

https://brainly.com/question/21665657

#SPJ1

The value of the line integral is [tex]\pi .[/tex]

We want to calculate the line integral of the vector field F(x, y, z) = <0, 2, z> over the curve C given by C(t) = (cos(t), sin(t), t),

where 0 <= t <= pi.

First, we need to parameterize F along C by replacing x, y, and z with their expressions in terms of t:

F(C(t)) = F(cos(t), sin(t), t) = <0, 2, t>

Next, we need to calculate the derivative of C with respect to t:

C'(t) = (-sin(t), cos(t), 1)

We can now set up the line integral:

∫C F · dr = ∫[0, pi] F(C(t)) · C'(t) dt

= ∫[0, pi] <0, 2, t> · (-sin(t), cos(t), 1) dt

= ∫[0, pi] (2cos(t) - tsin(t)) dt

= [2sin(t) + tcos(t)]|[0,pi]

= 2sin(pi) + picos(pi) - 2sin(0) - 0cos(0)

[tex]= \pi .[/tex]

For similar question on integral.

https://brainly.com/question/30215870

#SPJ11

The choice B is correct. Parallel to one another, both lines have the same slope of 5/3. They do not cross each other and do not share a point.

The slopes of the two lines can be used to figure out how they relate to one another. The formula for determining the slope of line m is as follows:

slope = (y2 - y1)/(x2 - x1)

Where (x1, y1) and (x2, y2) are any two focuses on the line. We obtain the following results by replacing (x1, y1) and (x2, y2) with the respective coordinates (5, 1) and (8, 6).

slope(m )= (6 - 1)/(8 - 5) = 5/3

Similarly, the slope of line n can be found using the coordinates (-4, 3) and (-1, 8):

slope_n = (8 - 3)/(-1 - (-4)) = 5/3

Since both lines have the same slope of 5/3, they are parallel to each other. They do not intersect and have no common point.

know more about slope visit :

https://brainly.com/question/3605446

#SPJ1

Rounding up to the nearest whole number, the sample size used in the study was 53.

We know that the margin of error for a 90% confidence interval is given by:

ME = z* (sigma/sqrt(n))

where z* is the z-score corresponding to the confidence level (90% in this case), sigma is the population standard deviation (unknown in this case), and n is the sample size.

The width of the confidence interval is given by:

width = 2*ME = 159 - 153 = 6

We can find the z-score corresponding to a 90% confidence level using a standard normal distribution table or calculator. The value is approximately 1.645.

Substituting the known values into the margin of error equation, we get:

6/2 = 1.645* (13/sqrt(n))

Solving for n, we get:

n = (1.645*13/3)^2

n ≈ 52.93

Rounding up to the nearest whole number, the sample size used in the study was 53.

learn about confidence interval,

https://brainly.com/question/20309162

#SPJ11

The mean score on the rescored exam is 75.5 points.

To find the mean of the rescored exam, we need to add 8 points to each student's score and then find the new mean.

To do this, we can use the formula:

New Mean = (Sum of Rescored Scores) / Number of Students

We know that there are 32 students and the original mean score was 67.2 points.

So the sum of the original scores is:

Sum of Original Scores = Mean x Number of Students
= 67.2 x 32
= 2144.

To find the sum of the rescored scores, we need to add 8 points to each student's score:

Sum of Rescored Scores = Sum of Original Scores + (8 x Number of Students)
= 2144 + (8 x 32)
= 2416.

Now we can find the new mean:

New Mean = Sum of Rescored Scores / Number of Students
= 2416 / 32
= 75.5.

Therefore, the mean score on the rescored exam is 75.5 points.

To learn more about mean score here:

https://brainly.com/question/15931564#

#SPJ11