AP Statistics Inference Tests and Intervals

AP Statistics Inference Tests and Intervals

12th Grade

14 Qs

quiz-placeholder

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AP Statistics Inference Tests and Intervals

AP Statistics Inference Tests and Intervals

Assessment

Quiz

Mathematics

12th Grade

Hard

Created by

Anthony Clark

FREE Resource

14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the margin of error of this sample?

0.28

0.14

0.342

0.684

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A random sample of 100 WHS students found that 53 of them were in possession of a pencil. What is the p-hat for this sample?

0.53

0.5

0.47

1

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The symbol for the sample proportion is __________.

Zc

E

q

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

To test a claim about a mean, when the population standard deviation is unknown we use:

z procedures

Pythagorean Theorem

t procedures

np > 10 and n(1-p) > 10

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A quality control inspector will measure the salt content (in milligrams) in a random sample of bags of potato chips from an hour of production. Which of the following would result in the smallest margin of error in estimating the mean salt content σ ?

90% confidence; n = 25 

90% confidence; n = 50 

95% confidence; n =25 

95% confidence; n =50 

n=100 at any confidence level 

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Scientists collect data on the blood cholesterol levels (milligrams per deciliter of blood) of a random sample of 25 laboratory rats. A 95% confidence interval for the mean blood cholesterol level μ is 80.2 to 89.8. Which of the following would cause the most worry about the validity of this interval?

There is a clear outlier in the data

A stemplot of the data shows a mild right skew

You do not know the population standard deviation σ

The population distribution is not exactly Normal.

None of these are a problem when using t-interval

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A random sample of 25 Ohio students had a mean ACT score of 21 with a standard deviation of 1.2.  Which of the following is the 95% confidence interval for the true average ACT score for Ohio students?

(20.53, 21.47)

(18.648, 23.352)

(20.505, 21.495)

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