We randomly selected 20 TWU alum and asked them if they ever drink underage when in college? 8 said that they did. What is the 90% confidence interval for the true proportion of TWU alum who engaged in underaged drinking when in college? Enter your answers accurate to two decimal places. (, ) The correct interpretation of the confidence interval is that we are 90% confident that the interval contains the Select an answer proportion data mean amount of Select an answer randomly selected sampled all TWU alum who engaged in underaged drinking when in college. Can we conclude that the proportion of all TWU alum who engaged in underaged drinking when in college is less than 0.59? Justify your answer. No; the entire interval does not agree with this claim. Yes; the entire interval agrees with this claim. Yes; the entire interval does not agree with this claim. No; the entire interval agrees with this claim. Choose the best response that discusses the validity of your results. Questionable −- there is likely to be some nonresponse bias Valid −- the sampling methodology is good and there are at least 5 successes and 5 failures Questionable −- there is likely to be some response bias Questionable −- the sample size is less than 30

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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We randomly selected 20 TWU alum and asked them if they ever drink underage when in college? 8 said that they did. What is the 90% confidence interval for the true proportion of TWU alum who engaged in underaged drinking when in college? Enter your answers accurate to two decimal places.

(, )

The correct interpretation of the confidence interval is that we are 90% confident that the interval contains the Select an answer proportion data mean amount of Select an answer randomly selected sampled all TWU alum who engaged in underaged drinking when in college.

Can we conclude that the proportion of all TWU alum who engaged in underaged drinking when in college is less than 0.59? Justify your answer.

No; the entire interval does not agree with this claim.
Yes; the entire interval agrees with this claim.
Yes; the entire interval does not agree with this claim.
No; the entire interval agrees with this claim.

Choose the best response that discusses the validity of your results.

Questionable −- there is likely to be some nonresponse bias
Valid −- the sampling methodology is good and there are at least 5 successes and 5 failures
Questionable −- there is likely to be some response bias
Questionable −- the sample size is less than 30

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