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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 4 points with 99% confidence assuming s=133 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 subjects. (Round up to the nearest subject)

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 4 points with 99% confidence assuming s=133 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 subjects. (Round up to the nearest subject)

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 4 points with 99% confidence assuming s = 13.3 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 subjects. (Round up to the nearest subject.)
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 4 points with 99% confidence assuming s = 13.3 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 subjects. (Round up to the nearest subject.)
Partial Critical Value Table Level of Confidence, (1-α) 100% 90% 95% 99% Area in Each Tail, 0.05 0.025 0.005 XX Critical Value, Zα/2 2 1.645 1.96 2.575 X
Transcribed Image Text:Partial Critical Value Table Level of Confidence, (1-α) 100% 90% 95% 99% Area in Each Tail, 0.05 0.025 0.005 XX Critical Value, Zα/2 2 1.645 1.96 2.575 X
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