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

2316

subjects randomly selected from an online group involved with ears.

965

surveys were returned. Construct a

90%

confidence interval for the proportion of returned surveys.

a.Find the best point estimate of the population proportion p.

b.Identify the value of the margin of error E

C. construct the confidence interval