Test: POST UNIT 6 - TEST . Ch. 9 Question 13 This Test: 13 pts possible Submit Test 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 9 based on earlier studies? Suppose the doctor would be content with 90% confidence How does the decrease in confidence affect the sample size required? Click the leon to view a partial table of critical values A 99% confidence level requires | ]subjects. (Round up to the nearest subject.) A 90% confidence level requires subjects (Round up to the nearest subject.) How doon the decrease in confidence affect the sample size required? O A. The sample size In the same for all levels of confidence O B. Decreasing the confidence level Increases the sample size needed O C, Decreasing the cordidance level decreases the sample size needed Click to select your answer(s) StatCrunch Submit Test Type here to search 6:56 PM 8/3/2021 20