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 = 19.7 based on earlier studies? Suppose the docto would be content with 95% confidence. How does the decrease in confidence affect the sample size required? Click the icon to view a partial table of critical values A 99% confidence level requires +6 subjects. (Round up to the nearest subject) A 95% confidence level requires 8 subjects. (Round up to the nearest subject) How does the decrease in confidence affect the sample size required? O A. Decreasing the confidence level decreases the sample size needed. O B. The sample size is the same for all levels of confidence. OC. Decreasing the confidence level increases the sample size needed
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 = 19.7 based on earlier studies? Suppose the docto would be content with 95% confidence. How does the decrease in confidence affect the sample size required? Click the icon to view a partial table of critical values A 99% confidence level requires +6 subjects. (Round up to the nearest subject) A 95% confidence level requires 8 subjects. (Round up to the nearest subject) How does the decrease in confidence affect the sample size required? O A. Decreasing the confidence level decreases the sample size needed. O B. The sample size is the same for all levels of confidence. OC. Decreasing the confidence level increases the sample size needed
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![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 = 19.7 based on earlier studies? Suppose the doctor
would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
Click the icon to view a partial table of critical values.
A 99% confidence level requires +6 subjects. (Round up to the nearest subject.)
A 95% confidence level requires 8 subjects. (Round up to the nearest subject.)
How does the decrease in confidence affect the sample size required?
O A. Decreasing the confidence level decreases the sample size needed.
B. The sample size is the same for all levels of confidence.
O C. Decreasing the confidence level increases the sample size needed.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb40d4242-3ac3-4a23-b8cc-f3704c2db427%2F83160f8e-7211-4eb6-976a-20cd79831a6a%2Fanplqzb_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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 = 19.7 based on earlier studies? Suppose the doctor
would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
Click the icon to view a partial table of critical values.
A 99% confidence level requires +6 subjects. (Round up to the nearest subject.)
A 95% confidence level requires 8 subjects. (Round up to the nearest subject.)
How does the decrease in confidence affect the sample size required?
O A. Decreasing the confidence level decreases the sample size needed.
B. The sample size is the same for all levels of confidence.
O C. Decreasing the confidence level increases the sample size needed.
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