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 with 99% confidence assuming s = 13.2 based on earlier studies? Suppose the doctor would be content with 95% confidence. How does the decrease in nce affect the sample size required? ck the icon to view a partial table of critical values. AZXE confidence level requires subjects. (Round up to the nearest subject.)

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Partial Critical Value Table
Level of Confidence,
(1-x) 100%
90%
95%
99%
Area in Each Tail,
a
2
0.05
0.025
0.005
Critical Value, Za/2
1.645
1.96
2.575
-
Transcribed Image Text:Partial Critical Value Table Level of Confidence, (1-x) 100% 90% 95% 99% Area in Each Tail, a 2 0.05 0.025 0.005 Critical Value, Za/2 1.645 1.96 2.575 -
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 = 13.2 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.
CO
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 = 13.2 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. CO A 99% confidence level requires subjects. (Round up to the nearest subject.)
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