C 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 2608 subjects randomly selected from an online group involved with G ears. 1111 surveys were returned. Construct a 99% confidence interval for the proportion of returned surveys. a) Find the best point estimate of the population proportion p. A 0.426 (Round to three decimal places as needed.) X C Vi More Click to select your answer(s). ? P Previous Que DUE AT 17 59 PM Score: -- M 4 7