CP STATS - Unit G Review

A survey asked a sample of 44 subjects if they think young children should be taken to nice restaurants. 9 of those surveyed said "no'. Calculate a 95% confidence interval for p.

• (0.11, 0.36)

• (0.10, 0.35)

• (0.12, 0.29)

• (0.05, 0.36)

When interpreting the confidence interval, you are describing the

• sample statistic

• population parameter

Increasing the sample size __________ the margin of error.

• increases

• decreases

• does not affect

• there is not enough information to determine the answer

Which of the following is the confidence interval for the response "Buses?"

• (17.9, 24.1)

• (21, 24)

• (18.9, 36.1)

• (17, 24)

A sample of 40 people owned an average of 1.35 apple products. It is known from a previous study that the population standard deviation of apple product ownership is 0.63 products. Construct a 95% confidence interval.

• (1.11, 1.58)
• (1.15, 1.55)
• (1.19, 1.51)
• (1.09, 1.61)

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

For a sample, the 95% confidence interval is (0.20, 0.40).

What is the margin of error in this interval?

• 0.30

• 0.20

• 0.10

• cannot be determined

Which of the following is the correct formula for a 95% confidence interval to estimate a proportion/percentage?

• 
• 
• 
• 

Which of the following is the correct formula for a 95% confidence interval to estimate a mean.

• 
• 
• 
• 

A research company wants to estimate the proportion of people who like oatmeal. They plan to calculate a 95% confidence interval from the results of their survey. The company randomly selects 325 people to take the survey, but on the day that the survey is issued, only 250 people turn in the survey. What is the largest concern you have with the accuracy of their confidence interval?

• The study has nonresponse bias

• The study has response bias

• The study has undercoverage

• No concerns with the study

A student wants to estimate the average amount of money seniors at her school plan to spend on prom. She randomly selects 10 seniors by ID number and asks them how much they plan to spend. She will report a confidence interval based on the survey results. What is the main concern you have with her confidence interval?

• The study suffers from nonresponse bias

• The study suffers from undercoverage

• Her sample size is too small, and thus the margin of error will be very large.

• No concerns with this study