i Q Points: 0 of 1 Save | A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed ~ to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s = 16.4 based on earlier studies? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required? | 5 Click the icon to view a partial table of critical values. A 99% confidence level requires D subjects. (Round up to the nearest subject.)