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 2 points with 99% confidence assuming s= 11.6 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. H A 99% confidence level requires 224 subjects. (Round up to the nearest subject.) A 95% 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 2 points with 99% confidence assuming s= 11.6 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. H A 99% confidence level requires 224 subjects. (Round up to the nearest subject.) A 95% confidence level requires subjects. (Round up to the nearest subject.)
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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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
2 points with 99% confidence assuming s= 11.6 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 224 subjects. (Round up to the nearest subject.)
A 95% confidence level requires
subjects. (Round up to the nearest subject.)
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a
hp
2 Pag
Transcribed Image Text:es
P
quir
quir
Partial Critical Value Table
Level of Confidence,
(1-α) 100%
●
90%
95%
99%
Our Study Plan
Area in Each Tail,
0.05
0.025
0.005
Print
C
2
Critical Value, Zα/2
1.645
1.96
2.575
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