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A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many subjec


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A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the HDL cholesterol within 4 points with 99% confidence assuming sigma equals 12.8 question mark Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?

A 95 %confidence level requires __ subjects.


Sample Size for 99% CI, E = 4 and ? = 12.8

 

Confidence level = 99% and Desired Margin of Error, E = 4.

 

Minimum sample size is given by:

 

x

 

¯?µ

 

E

 

P (|¯

 

x ? µ| < E) ? 1 ? ? ? P ( ?...

 


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A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many subjec.zip

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