A statistics professor gives a survey to each of the 20 students in an introductory statistics course. The survey asks the students to estimate when they typically wake up on weekdays. The data are recorded in terms of the number of hours after midnight the students wake up. The data are included below. Use Excel to calculate the population standard deviation and the population variance.


Round your answers to three decimal places.




Wake up time

7.5

7.5

7.5

7.5

7.5

7

7

7

7

7

7

7

6.5

6.5

6.5

6

6

6.7

6.5

6.5

Answer:

yes

Step-by-step explanation:

only like terms can be combined

Answer:

yes. If it's variables, then only like variables can be combined. If it's fractions, then they must be converted to a common denominator before combining.

Step-by-step explanation:

Answer:

20,2,0,-4,-.0625

Step-by-step explanation

3*-4=-12

depending on which side its on you can multiply or divide by -4

K= -4

23.3feet.....................

Answer:

This is true.

Step-by-step explanation:

No matter where you put the dot on the circumference, the radius will connect to the center, and be the same distance.

Answer:

A

Step-by-step explanation:

Dilation by 3 from origin causes each point to be multiplied by 3.

(3,3) * 3 = (9, 9)

(6, 6) * 3 = (18, 18)

(9, 3) * 3 = (27, 9)

which is A

Answer:

They recieved 192 crayons?

Answer:

The Answer Is 192

Step-by-step explanation:

Answer:

4.2

Step-by-step explanation:

the kilometro is 5 and race is 21. 5÷21=4.2

Answer:

Step-by-step explanation:

If Ron has 600 shares, he has:

50,000 shares represents 100%

50,000...........................100%

600......................................?

600*100/50,000=1.2% he owns

Answer:

27.50

Step-by-step explanation:

Since it is 16.50 each and they bought 5 packets total an easy way to solve this problem would be that you multiply 16.50 × 5 which will give you how much the total cost of the candy would be:

16.50 × 5 = 82.50

Since that is the total amount you would then divide 82.50 by 3 since Mary and her friends all split the cost three ways (since there are three of them):

82.50 ÷ 3 = 27.50

Which will give you your answer.

Answer:

Bottom right table

Step-by-step explanation:

A table will show a linear relationship when there is a common difference. To determine this, we first ensure that the x values are increasing at the same value and then find the difference of consecutive y values.

Top left table

11-7=3

12-11=1

13-12=1

Because the differences between the y values are not all the same, this table does not represent a linear function.

Top right table

9-7=2

12-9=3

15-12=3

Again, there is no common difference, so this table does not represent a linear function.

Bottom left table

The x values are different now but they still increase by the same increment each time, so we continue subtracting the y values normally.

9-7=2

12-9=3

15-12=3

This table does not represent a linear function.

Bottom right table

9-7=2

11-9=2

13-11=2

Because there is a common difference, this table represents a linear function.

I hope this helps!

Answer:

12 one fourths

Step-by-step explanation:

Answer:

12 one fourths

Step-by-step explanation:

There 3 × 1 1/4 = 3 × 4 = 12 one fourths in 3

Answer:

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Answer:

27

Step-by-step explanation:

The Counting Principle states that the number of possible outcomes is equal to the product of the number of outcomes for each event. In this case, (M)(N)(O).

There are 27 possible outcome if the spinner is spun three times.

Probability is a number that expresses the likelihood or chance that a specific event will take place. Both proportions ranging from 0 to 1 and percentages ranging from 0% to 100% can be used to describe probabilities.

Given, A spinner has three sections colored green, purple, and pink.

From the general formula of probability:

Probability = (desired outcomes)/(Total outcomes)

In our case,

the three possible outcomes of this event occurring are Green, Purple, and Purple, Green.

The desired outcomes = 3

The total outcomes = 3 x 3 x 3 = 27

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Answer:

35x48=1680

Step-by-step explanation:

1680

Answer:

13f=29

Step-by-step explanation:

I hope this helps you out!

Step-by-step explanation:

-3/10+ -1/5

find the common denominator. on that case its 10

10 into 10 that's 1 so 3 remain 3 . then 5 into 10 its 2 so 1×2=2

-3/10 + -2/10

-3+-2

-3-2= -5

-5/10= -1/2

Ans is -1/2

-18/15 ×5/-4

you cross multiply. 5into 15 to get a denominator 3 then -4/2=-2 denominator. -18/2=-9. you multiply 3×-2=-6 then we are left with

-9/-6= -3/-2=1 and half

Ans is 1 1/2 (one and 1 half ).

3/8÷ -1/4

you spin -1/4 to -4/1 inorder to change the sign to a multiplication sign.

3/8 × -4/1 1

cross multiply to get -3/2

-3/2 = - 1 1/2

Ans : 1 1/2 ( one and one half )

pliz mark my answer branliest

Answer:

3/4

Step-by-step explanation:

The value of tangent ratio [tex]tan \beta[/tex] in the triangle is [tex]\frac{3}{4}[/tex].

Trigonometric Ratios are defined as the values of all the trigonometric functions based on the value of the ratio of sides in a right-angled triangle. The ratios of sides of a right-angled triangle with respect to any of its acute angles are known as the trigonometric ratios of that particular angle.

Review all six trigonometric ratios: sine, cosine, tangent, cotangent, secant, & cosecant.

Tangent ratio is yet another trigonometric ratio for right-angled triangles. Tangent ratio is the ratio of opposite side to adjacent side of a right triangle.

According to the triangle ABC

<C = [tex]90^{0}[/tex], <B = [tex]\beta[/tex], AB = 5, BC = 4, AC = 3

Tangent ratio is the ratio of opposite side to adjacent side of a right triangle.

Tangent ratio is one of the trigonometric ratios.

[tex]tan \beta=\frac{AC}{BC} = \frac{3}{4}[/tex]

Hence,

The value of [tex]tan \beta[/tex] in the triangle is [tex]\frac{3}{4}[/tex].

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Answer:

Can you tell the question in english please

Answer:

46 47 48 49 50 51 52 53 54

Answer:

5:2

Step-by-step explanation:

5b=3c=2a

So 5b=2a

2a=5b

5:2 = a:b

To check crossmultiply, and you get 2a=5b

The equation by completing the square (x + 7)^2 = 16 or  (x - 7)^2 = 16. The solutions to the equation are; A. x = -4 ± 3

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

Consider the equation: x^2=-8x-7

1) Rewrite the equation by completing the square. Write it as (x+c)^2=d or (x-c)^2=d

Here the equation: x^2=-8x-7

x^2 + 8x + 7 = 0

Where a = 2, b = 8 , c = 7

(x+c)^2 = d or (x + 7)^2 = 16

(x-c)^2=d or  (x - 7)^2 = 16

2) The solutions to the equation are;

A. x = -4 ± 3

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Answers

1)

We can rewrite the equation as (x+4)^2=9

2)

 x=−4±3

Got my answers from khan :)

Answer:

See below

Step-by-step explanation:

Problem 1

If n is the smallest of the consecutive integers, the next integer would be n+1.

Problem 2

The equation is terms of n is going to be

s = n + n + 1 + n + 2 + n+3

Problem 3

Collect like terms on the right

s = 4n + 6

Problem 4

4n + 6 = s             Subtract 6 from both sides

4n = s - 6              Divide by 4

n = (s - 6)/4

Problem 5

Solve for n when s = 2174

n = (2174 - 6)/4

n = 2168 / 4

n = 542

check

n                 = 542

n + 1            = 543

n + 2           = 544

n + 3          = 545

Total            2174         Just as it should

Answer:

£12605.15

Step-by-step explanation:

Compound interest formula

34000(1-0.18)^5

The worth car after 5 years will be £12,605.15.

A loan or deposit's interest is computed using the starting principle and the interest payments from the ago decade as compound interest.

We know that the compound interest is given as

[tex]\rm A = P \left (1 \pm r \right ) ^{t}[/tex]

Where A is the amount, P is the initial amount, r is the rate of interest, and t is the number of years.

Alex's vehicle deteriorates in esteem by 18% each year. Alex purchased his vehicle for £34000. Then the worth car after 5 years will be given as,

A = 34,000 (1 - 0.18)⁵

A = 34,000 x (0.82)⁵

A = 34,000 x 0.3707

A = £12,605.15

The worth car after 5 years will be £12,605.15.

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Answer:

1/5 + 1/5 + 1/5 + 1/5 = 4/5

Step-by-step explanation:

The 4 copies of the fraction 1/5 will be 4/5.

Arithmetic operators are four basic mathematical operations in which summation, subtraction, division, and multiplication involve.,

Summation = addition of two or more numbers or variable

As per the given,

4 copies of 1/5

The first copy of /5 = 1/5

Second one = 1/5

Third = 1/5

And fourth = 1/5

Collective all copies are 1/5 + 1/5 + 1/5 + 1/5

Take LCM as 5,

(1 + 1 + 1 + 1)/5 = 4/5

Hence "The 4 copies of the fraction 1/5 will be 4/5".

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Answer:

K should be the answer mark me Brainest :)

Step-by-step explanation:

Answer:

(1,1)

x=1  y=1

Step-by-step explanation:

When you solve by substitution, you have to isolate each equation Hope this helps.