Test: Optional Exam 3 Question 10 of 12 This test: 12 point(s) possible This question: 1 point(s) possible Submit test 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 2626 subjects randomly selected from an online group involved with ears. 933 surveys were returned. Construct a 99% 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. O (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E - (Round to three decimal places as needed.) c) Construct the confidence interval. (Round to three decimal places as needed.) d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below. O A. One has 99% confidence that the sample proportion is equal to the population proportion. O B. 99% of sample proportions will fall between the lower bound and the upper bound. C. There is a 99% chance that the true value of the population proportion will fall between the lower bound and the upper bound. O D. One has 99% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion