AP Stat Confidence Interval Proportion

AP Stat Confidence Interval Proportion

12th Grade

20 Qs

quiz-placeholder

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AP Stat Confidence Interval Proportion

AP Stat Confidence Interval Proportion

Assessment

Quiz

Mathematics

12th Grade

Hard

Created by

Anthony Clark

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A survey indicates 14 of 71 respondents brush their teeth multiple times per day

1 prop z int

2 prop z int

1 sample t int

2 sample t int

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A research company wants to estimate the proportion of people who like oatmeal to determine if the proportion has increased. They want the confidence level to be 95%. The company had questioned 325 randomly selected people and found 48% liked oatmeal, but in a recent survey of 250 people, only 45% liked oatmeal.

1 prop z int

2 prop z int

1 sample t int

2 sample t int

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A recent study of 750 Internet users in Europe found that 35% of Internet users were women.  What is the 95% confidence interval of the true proportion of women in Europe who use the Internet? 

0.321 < p < 0.379

0.316 < p < 0.384

0.309 < p < 0.391

0.305 < p < 0.395

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A survey of 800 women shoppers found that 17% of them shop on impulse.  What is the 98% confidence interval for the true proportion of women shoppers who shop on impulse? 

0.148 < p < 0.192

0.136 < p < 0.204

0.144 < p < 0.196

0.139 < p < 0.201

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Sanjay is researching if female students are more or less likely than male students to have received extra credit at a large university. He takes a random sample of 300 students. Sanjay used this sample to build a 95% confidence interval to estimate the difference between the proportion of females and males receiving extra credit. The resulting interval was 0.05±0.07. Based on the interval, what do we know about the corresponding P-value and conclusion at the α=0.05 level of significance?

The P-value is less than α=0.05, and he cannot conclude that there is a difference between the proportions.

The P-value is less than α=0.05, and he should conclude that there is a difference between the proportions.

The P-value is greater than α=0.05, and he cannot conclude that there is a difference between the proportions.

The P-value is greater than α=0.05, and he should conclude that there is a difference between the proportions.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Sanjay is researching if female students are more or less likely than male students to have received extra credit at a large university. He takes a random sample of 300 students. Sanjay used this sample to build a 95% confidence interval to estimate the difference between the proportion of females and males receiving extra credit. The resulting interval was 0.05±0.07. Based on the interval, what do we know about the corresponding P-value and conclusion at the α=0.05 level of significance?

The P-value is less than α=0.05, and he cannot conclude that there is a difference between the proportions.

The P-value is less than α=0.05, and he should conclude that there is a difference between the proportions.

The P-value is greater than α=0.05, and he cannot conclude that there is a difference between the proportions.

The P-value is greater than α=0.05, and he should conclude that there is a difference between the proportions.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets.  What is the 90% confidence interval of the true proportion of teenage boys who have received speeding tickets? 

(0.621, 0.780)

(0.591, 0.812)

(0.584, 0.830)

(0.615, 0.805)

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