Question 1. use the above survey results to construct a 95% confidence interval for the proportion p of all ohio state university female students who would be willing to walk somewhere after dark that they would normally not go if they had a cell phone.

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Karlie Finley

Business

9 March, 19:03

Question 1. use the above survey results to construct a 95% confidence interval for the proportion p of all ohio state university female students who would be willing to walk somewhere after dark that they would normally not go if they had a cell phone.

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Lauren Bridges · Answer 1

Za/2 = invnorm (.975,0,1) = 1.96

confidence interval:

.42 + / - 1.96*square root of ((.42) (1-.42) / 305)

.42 + / -.05539

(.42 -.05539,.42 +.05539

(.36461,.47539)

Lower bound:.365 (rounded to 3 decimals)

Upper bound:.475 (rounded to 3 decimals)