B) Identify the value of the margin of error E

C) Construct the confidence interval

of 1 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 2653 subjects randomly selected from an online group involved with ears. 1086 surveys were returned. Construct a 90% 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.)