(1 point) Scores on a standardized exam are known to follow a normal distribution with standard deviation o = 17. A researcher randomly selects 130 students and computes their average score. He reports that the mean score is 73.4, with a margin of error of 1.697. How confident are you that the mean score for all students taking the exam is in the interval (71.703, 75.097)? Confidence =(1 point) The distribution of scores on a standardized test is approximately Normal with standard deviation of o = 13. If a sample of 100 students had a mean score of @ = 76.3, use this to find a 99% confidence interval for the mean score of all students on this test. We are 99% confident that the the mean score of students on this test was in the interval to What is the margin of error for your confidence interval? Margin of error =(1 point) A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 94.78% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation o = 35 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 11 mg/dl? A sample of at least people.(1 point) A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 92.03% 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 13 mg/dl? A sample of at least people