AP Stat Confidence Interval Proportion

Quiz
•
Mathematics
•
12th Grade
•
Hard
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
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
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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