Question

Use the sample data and confidence level given below to complete parts​ (a) through​ (d).

In a study of cell phone use and brain hemispheric​ dominance, an Internet survey was​ e-mailed to 2620 subjects randomly selected from an online group involved with ears. 1080

surveys were returned. Construct a 99​% confidence interval for the proportion of returned surveys.

USE Z SCORE TABLE

​a) Find the best point estimate of the population proportion p. _____________ ​(Round to three decimal places as​ needed.)

​b) Identify the value of the margin of error E. E=_________ ​(Round to three decimal places as​ needed.)

​c) Construct the confidence interval.

________<p<__________ ​(Round to three decimal places as​ needed.)

​d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below.

A.One has 99​% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion.

B.One has 99​% confidence that the sample proportion is equal to the population proportion.

C.There is a 99​% chance that the true value of the population proportion will fall between the lower bound and the upper bound.

D.99​% of sample proportions will fall between the lower bound and the upper bound.

Answer 1

Answer:-

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