(1 point) A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 86.68% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation o = 30 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 9 mg/dl? A sample of at least people. Preview My Answers Submit Answers