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 2670 subjects randomly selected from an online group involved with ears. 1149 surveys were returned. Construct a 90​% confidence interval for the proportion of returned surveys.   LOADING... Click the icon to view a table of z scores. ​a) Find the best point estimate of the population proportion p.   nothing ​(Round to three decimal places as​ needed.) ​b) Identify the value of the margin of error E.   E=nothing ​(Round to three decimal places as​ needed.) ​c) Construct the confidence interval.   nothing

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Q: c) i: Calculate the average and median to the results. ii: Find a 95% confidence interval for µ.

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.