AP Statistics Confidence Interval

AP Statistics Confidence Interval

12th Grade

15 Qs

quiz-placeholder

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AP Statistics Confidence Interval

AP Statistics Confidence Interval

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Hard

Created by

Anthony Clark

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15 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the critical value, z*, for 91% confidence.

1.70

1.34

0.18

-1.34

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the critical value, z* for 97%

1.88

2.17

-1.88

-2.17

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If 827 represents "no" voters out of 2584, construct a 95% confidence interval for the "no" group.

[.300,.340]

[.298,.342]

[.302,.338]

[.288,.352]

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The symbol for the sample proportion is __________.

Zc

E

q

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

2000 children were surveyed and the report that followed said, "With 98% confidence, between 20% and 50% of all parents make their children eat breakfast." What does 98% confidence mean in this situation?

We can be 98% confident that the method used to get the intervals always gives the correct answer

98% of all parents will make their kids eat breakfast

When used repeatedly, the method used to find the interval produces intervals which include the true proportion about 98% of the time

The kids were 98% confident that they ate breakfast that day.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Mrs. Soto polled 1000 adults and estimated with 90% confidence that the proportion of adults who have dessert after dinner is .75. Ms. Libner thinks that 90% confidence isn't enough and wants to do a 95% confidence. How would a margin of error for 95% compare with a ME for 90% if the same sample size was used?

It would be smaller because a higher confidence means a smaller MOE

It would be larger because a higher confidence means a larger MOE

It would be the same because the sample size is the same

Won't be able to tell without knowing the true parameter

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following would not decrease the width of a confidence interval?

I only

II only

III only

I and II only

II and III only

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