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1. A survey of 200 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. Suppose that based on the sNurvey, 70 of the 200 students responded "yes."

a) What is the value of the sample proportion p?

b) What is the standard error of the sample proportion?

c) Construct an approximate 95% confidence interval for the true proportion p by taking ; 2 SEs from the sample proportion.

2. From a survey of 250 coworkers you find thaNt 155 would like the company to provide on-site day care.

a) What is the value of the sample proportion p?

b) What is the standard error of the sample proportion?

c) Construct an approximate 95% confidence interval for the true proportion p by taking ; 2 SEs from the sample proportion.

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Category:- Statistics and Probability
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