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 2580 subjects randomly selected from an online group involved with ears 975 surveys were returned Construct a90% confidence interval for the proportion of returned surveysClick the icon to view a table of z scoresb) Identify the value of the margin of error E.E=(Round to three decimal places as needed)