the sample data and confidence level given below to complete parts (a) through (d). a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2446 subjects randomly selected from an online group involved with ears. 979 surveys were returned. Construct 39% confidence interval for the proportion of returned surveys. Click the icon to view a table of z scores. 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=0 (Round to three decimal places as needed) c) Construct the confidence interval 0

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