Select the correct answer.
As part of a class project, Sarah and Geoffrey conducted a survey asking their peers whether they planned on taking a music class the next year.
of the 90 students they surveyed, 43 responded favorably. Sarah and Geoffrey calculated the margin of error for different confidence intervals.
Their work is shown.
Sarah
Geoffrey
95% confidence:
90% confidence
ME = 1.96
0.48(1 - 0.48)
90
ME = 1.65V
133
Which student incorrectly found the margin of error and why?
A. Sarah incorrectly found the margin of error because she used the wrong critical value.
B. Sarah incorrectly found the margin of error because she used the wrong sample proportion
C. Geoffrey incorrectly found the margin of error because he used the wrong sample size.
D. Geoffrey incorrectly found the margin of error because he used the wrong critical value.
Answers
Answer:
Geoffrey incorrectly found the margin of error because he used the wrong sample size.
Please give be brainliest, I really need it.
Geoffrey incorrectly found the margin of error because he used the wrong sample size. Therefore, the correct option is option B.
What is mathematical error?Measurement Error is the difference between the approximated value and the actual value of an object/quantity. The relative error can be computed in the percent with the help of relative error formula. Errors in measuring instruments occur due to inescapable faults in the measuring instrument and limitations of the human eye.
There are three types of errors in solving mathematics problems, which are factual error, procedural error, and computational error. Geoffrey incorrectly found the margin of error because he used the wrong sample size.
Therefore, the correct option is option B.
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Related Questions
Which ordered pair describes the location of point A? (-6, 5) (-6, -5) (5, -6) (5, 6)
Answers
Answer:
the answer is -6,5
Step-by-step explanation:
just look at the left side ( the x axis )first then right(the y axis)
8. If
VW = 9x-11 and
SU = 16x - 12 find WT
Answers
Answer:
WT = 34
Step-by-step explanation:
The ultimate goal here to pinpoint what x is equivalent to. In a rectangle we know that the diagonals are congruent as well as the fact that they bisect each other. This means cutting in half. Using this knowledge we know VW = 9x - 11 is half of SU = 16x - 12.
Step One: Multiply 9x - 11 by 2.
2(9x - 11) = 18x - 22
Step Two: Set up your equation
18x - 22 = 16x - 12
Step Three: Solve for x
18x - 22 = 16x - 12
2x - 22 = -12
2x = 10
x = 5
Step Four: Substitute to check your work
16(5) - 12 = 68
9(5) - 11 = 34
Again, since the diagonals of a rectangle bisect each other VW = WT.
34 is half of 68 proving our findings.
The length of WT is 34.
What is Rectangle?Rectangle is a two dimensional figure which has four sides and four angles and all the angles are right angles.
We have,
VW = 9x - 11
Diagonals of a rectangle bisect each other.
So, WT = 9x - 11
VT = 2(9x - 11)
Also, we have,
SU = 16x - 12
The two diagonals of a rectangle are equal.
2(9x - 11) = 16x - 12
18x - 22 = 16x - 12
18x - 16x = -12 + 22
2x = 10
x = 5
WT = 9x - 11 = (9 × 5) - 11 = 34
Hence the length of the line WT is 34.
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A traffic camera sits on top of a tower that has a height of 39 ft. The angles of depression of a car on a straight road at the same level as that of the base of the tower and on the same side of the tower are 31°. Calculate the the distance between the base of the poll and the car. Round to the nearest tenth of a foot. *
Answers
Answer:
48ft
Step-by-step explanation:
Distance of car A from the towerConsider ∆ACD tan25 = 50/AC AC = 50/tan25 = 50/0.4663 = 107.2 ft Distance of car B from the towerConsider ∆BCD tan40 = 50/BC AC = 50/tan40 = 50/0.8391 = 59.6 ftDistance from cars A and B AB = AC – BC = 107.2 – 59.6 = 48 ft The distance between the two cars is 48ftThe price of a 6-minute phone call is 1.80 what is the price of a 17-minute phone call
Answers
Answer:
$5.10
Step-by-step explanation:
Ratios:
[tex]\frac{6}{1.8} =\frac{17}{x} \\\\6x=30.6\\x=5.1[/tex]
Find the volume of a pyramid with a square base, where the area of the base is
8.3 mº and the height of the pyramid is 6.3 m. Round your answer to the nearest
tenth of a cubic meter.
Answers
Answer: 17.4 m^3
Step-by-step explanation:
V= 1/3 Bh
B=8.3
H=6.3
V=1/3 (8.3)(6.3)
V=17.43
V=17.4m^3
Find the value of AB.
D
10
6
А
E
В
AB = [?]
Answers
Answer:
AB= 16❤
Step-by-step explanation:
OB= 10
EB²+6²= 10²
EB²= 64
EB=8
2×8=16
The length of line AB in the intersecting chords is determined as 16 units.
What is the length of AB?The length of line AB is calculated by applying intersecting chord theorem as follows;
The radius of the circle = 10
Applying Pythagorean theorem as follows;
EB² + 6²= r²
where;
r is the radius of the circle = 10EB² + 6²= 10²
EB² = 10² - 6²
EB² = 100 - 36
EB²= 64
EB = √ 64
EB = 8
Since EB is the half of length AB, then the value of the length AB is calculated as;
AB = 2 x 8
AB = 16 units
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Kim wants to solve the equation 538+ 223= x. How should Kim rewrite the sum in order to solve for x?
Answers
Answer:
x = 761
Step-by-step explanation:
x = 538 + 223
x = 761
Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood. She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond. Why is this sample likely to be biased?
A.
Alex sent a questionnaire by email instead of going door to door.
B.
Alex sent the questionnaire only to those who live near her.
C.
Not everyone who got the questionnaire responded.
D.
Those who got the questionnaire may not have responded on time.
Answers
Answer:
The answer is B
This is because if we know that Alex sent the questionnaire only to those who live near her, we can infer that this is biased.
Answer:
B: Alex sent the questionnaire only to those who live near her
Step-by-step explanation:
<3
Help me please and i will give you a brainlist
Answers
Answer:
I believe it's Option B, hopefully this helps! Sorry if it doesn't
what is -2.3 -1.2
explain your answer
Answers
Answer:
-2.3 - 1.2 = -3.5
Step-by-step explanation:
when we’re doing negative adding means subtracting so what I idi was add 2.3 and 1.2 and I got 3.5 so I think what number is bigger it’s -2.3 so since it’s negtive I put a negative that’s how I got it
choose the correct vertical asymptote(s).
Glven the function, f(x) =
x+1
X-4
O x= -4, x= 4
O x= 4
O x= -2, x = 2
O x= 2
Answers
Se tienen cuatro libros de Matemáticas, tres Biología y tres Religión ¿De cuántas maneras diferentes se pueden ordenar todos los libros en línea recta?
Answers
Answer:
4,200
Step-by-step explanation:
Tenemos un total de:
4 libros de matemáticas
3 libros de biología
3 libros de religión
10 libros en total.
Ahora vamos a contar la cantidad de opciones que tenemos para cada posicion.
Primer libro (tenemos 10 opciones)
segundo libro (tenemos 9 opciones, porque ya colocamos un libro)
tercer libro (tenemos 8 opciones, porque ya colocamos dos libros)
Con esto ya podemos estimar el número de opciones para cada posicion, y sabemos que el número total de combinaciones es igual al producto entre los números de opciones para cada caso. El número total de combinaciones es:
C = 10*9*8*7*6*5*4*3*2*1 = 10!
Ahora si asumimos que no podemos diferenciar los libros de matemáticas, entonces no debemos contar sus permutaciones (si tenemos 4 libros de matemáticas, tenemos 4*3*2*1 permutaciones = 4! permutaciones). Debemos dividir al numero total de combinaciones por 4!.
Y lo mismo pasa para las 3! permutaciones de los libros de biología y las 3! permutaciones de los libros de religión.
Entonces el número total de combinaciones diferentes es:
[tex]C = \frac{10!}{3!*4!*3!} = \frac{10*9*8*7*6*5*4*3*2*1}{(3*2*1)*(4*3*2*1)*(3*2*1)} = 4,200[/tex]
Hay 4200 diferentes formas de ordenar los libros.
A total of 477 tickets were sold for the school play. They were either adult tickets or student tickets. There were 73 fewer student tickets sold than adult tickets. How many adult tickets were sold?
Answers
Please answer, yes, or no.
Answers
Answer:
No if you see this sign means (<) that the number in like this1<2 that 2 is greater than 1 so it would be no because it would be this way 9>7 not 9<7
Step-by-step explanation:
Mr. Stewart said that he would pay $750 for a bedroom suite. The suite Mrs. Stewart wants costs $250 less than twice as much money as Mr. Stewart will spend. How much does the suite cost that Mrs. Stewart wants?
Answers
Answer:
$1,250
Step-by-step explanation:
Mr. Stewart will spend $750
Mrs. Steward wants $250 less than twice that
750 * 2 is 1500
1500 - 250 is 1250, our final answer
brainliest? please and thank you.
Only number 1 please
Answers
Answer:
a is k, b is k and l, c is j and l, d is j and r, thats all i know, lol
Step-by-step explanation:
K is Center, Radius KJ KI,KI, JR diameter.
Here we have given a diagram from the given diagram
What is the definition of the center?Center :- The center of a circle is the point equidistant from the points on the edge
Therefore center is k.
Radius:-The distance from the center of the circle to any point on it's circumference
Radius is KJ,KL,KI
Chord :-The chord of a circle can be defined as the line segment joining any two points on the circumference of the circle.
chord is J and I
Diameter:-In a circle, diameter is a line that passes through the center and meets the circumference at opposite ends.
JR is the diameter.
I have solve first four part of this question
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Chyanee's meal cost $30.25 and Tango's meal cost $25.75. Chyanee treats Yanci by playing for both meals and leaves a 10% tip. Explain in writing (typing) how to find the amount both meals cost,the amount of the tip and the total amount of money Chyanee spent.(Remember to write 5 or more complete sentences.)
Answers
Answer:
itS 876
Step-by-step explanation:
Answer:
The meal was $56. The tip was $5.6. Overall the amount was 61.6
Step-by-step explanation:
Well first I looked for the meal prices (30.25, 25.75). I added the meals and got 56. Then I looked for the tip amount (10% of 56). I then found that 10% if 56 is 5.6. Lastly, I added 56 and 5.6 to get the overall amount (61.6). That’s how I got my answer(s).
i need help with that please .
Answers
Steps:
y = 4x - 9
Substitute x for y since y=x
x = 4x - 9
x - 4x = 9
-3x = -9
x = -9/-3
x = 3
Y = x
Y = 3
Check:
y = x
3 = 3 ✅
y = 4x - 9
3 = 4(3) - 9
3 = 12 - 9
3 = 3 ✅
Answer:
3,3
Step-by-step explanation:
You and your friends were playing basketball last week. You were short a
player, so your younger sister joined the game. She crushed it scoring 12 shots for 28 points. How many 2 and 3 point baskets did she score?
Write a solution to the sister's basketball game.
Answers
Answer:
there are multiple solutions to this but one is...
3+3+3+3+2+2+2+3+2+2+3
Step-by-step explanation:
you can create other solutions by taking both 2 and 3 consecitvly and adding them until you get 28.
Answer:
She made eight 2 pointers
She made four 3 pointers
Step-by-step explanation:
2x + 3y = 28
x + y = 12 Multiply this equation by 2
2x + 2y =24
Write the first and third equations underneath each other,
2x + 3y = 28
2x + 2y = 24 Subtract.
y = 4
x + y = 12
x + 4 = 12 Subtract 4 from each side
- 4 -4
x = 8
What are the zeros of f(0) ** - 202
OAX-5 and x4
BN-10 and x = 2
OCX-2 and x = 10
DX-4 and 5
Answers
Answer:
b
Step-by-step explanation:
-33/9+2 please help I need it ASAP
Answers
Answer:
Step-by-step explanation:
[tex]\frac{-33}{9}+2=\frac{-33}{9}+\frac{2*9}{1*9}\\\\\\=\frac{-33}{9}+\frac{18}{9}\\\\= \frac{-33+18}{9}\\\\=\frac{-15}{9}[/tex]
GCF of 15 and 9 is 3. so divide both numerator and denominator by 3
[tex]= \frac{-5}{3}\\\\= -1\frac{2}{3}[/tex]
Help needed asap will give brainliest
Answers
The answer is the atomic mass. Hope this helps!!
Answer:
Neutrons and protons make up the atoms atomic mass.
2.5:3.5 simplified ratio
Answers
Answer:
5:7
Step-by-step explanation:
Solve the following quadratic formula and enter the solutions below from smallest to largest. Round to the nearest tenth if necessary.
Equation: 4x2+8x+7=4
Solution: Answer
and
Answers
Answer:
solution given:
: 4x2+8x+7=4
4x²+8x+7-4=0
4x³+8x+3=0
4x²+6x+2x+3=0
2x(2x+3)+1(2x+3)=0
(2x+3)(2x+1)=0
either
x=-3/2
or
x=-1/2
Help I’ll give Brainly est
Answers
Answer:
26 sq units.......
Mrs. Watson shared a cheese pizza among herself and four children. Each person ate 18 of the pizza. How much of the pizza was eaten in all?
Answers
Answer:
90
Step-by-step explanation:
my question is the picture
Answers
Answer:
20 students
Step-by-step explanation:
You first have to add the number of students all up and you get 200.Then you do cross multiplication.
40/200 x s/100=
40x100= 4000=
200xs= 200s=
200s/200=
4000/200=
20=
BRAINIEST TO WHOEVER RIGHT “ identify the box and whisker plot that represents the data.” “Cat lengths (in inches) : 16, 18, 20, 25, 17, 22, 23, 21”
Answers
First we have to put he data set in ascending order:
16, 17, 18, 20, 21, 22, 23, 25
The median (middle number or average of 2 middle numbers) = 20.5 The center line of the box needs to be at 20.5
The middle of the first half of the data is 17.5, (average of 17 & 18) so the left side of the box needs to be at 17.5
The middle of the second half of the data is 22.5, (average of 22 & 23), so the right side of the box needs to be at 22.5.
The “whiskers” are your bottom & top numbers...representing the full range of data. They should be at 16 & 25.
PLSSSS HELPPPP 30 POINTSSSS
Jaylon spent $27.60 of the $80 he got for his birthday. What percent of his money did spends
Answers
Answer:
35.4%
Step-by-step explanation:
(100/80) x 27.6
basically 1 of 80 is 1.25 and multiply 1.25 times the money jaylon spent sorry i am really bad at explaining only good at solving
Answer:
34.5%
Step-by-step explanation:
to find the percent of money that was spent, you turn it into a fraction-
27.60/80
=0.345
then to get the percent you multiply-
0.345*100
=34.5%
good luck :)
i hope this helps
brainliest would be highly appreciated
have a nice day!
Robert has x books. Marie has twice as many books as Robert has. Together they have 18 books. Which of the following equations can be used to find the number of books that Robert has? Choose one multiple choice answer
x+2=18
x+x+2=18
x+2x=18
2x=18
Answers
Answer:
the answer: x+2x=18
Step-by-step explanation:
