Question

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

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

33

points with

99 %

confidence assuming

sigma equals 10.8 question markσ=10.8?

Suppose the doctor would be content with

95 %

confidence. How does the decrease in confidence affect the sample size​ required?

A​ 99% confidence level requires

nothing

subjects.

​(Round up to the nearest whole number as​ needed.)

Homework Answers

Answer #1

Solution :

Given that,

Population standard deviation = = 10.8

Margin of error = E = 0.33

1)

Z/2 = 2.576

sample size = n = [Z/2* / E] 2

n = [2.576 * 10.8 / 0.33]2

n = 7108

Sample size = n = 7108

2)

Z/2 = 1.96

sample size = n = [Z/2* / E] 2

n = [1.96 * 10.8 / 0.33]2

n = 4115

Sample size = n = 4115

the decrease in confidence level the sample size​ is decreased

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A doctor wants to estimate the HDL cholesterol of all​ 20- to​ 29-year-old females. How many...
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 11.4 question mark Suppose the doctor would be content with 95 % confidence. How does the decrease in confidence affect the sample size​ required? A​ 99% confidence level requires nothing subjects. ​(Round up to the nearest whole number as​ needed.) A 95 % confidence level requires...
A doctor wants to estimate the HDL cholesterol of all​ 20- to​ 29-year-old females. How many...
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 3 points with 99 % confidence assuming sigma equals 13.5 question mark Suppose the doctor would be content with 95 % confidence. How does the decrease in confidence affect the sample size​ required? A​ 99% confidence level requires nothing subjects. ​(Round up to the nearest whole number as​ needed.) A 95 % confidence level requires...
A doctor wants to estimate the HDL cholesterol of all​ 20- to​ 29-year-old females. How many...
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 12.7 question mark Suppose the doctor would be content with 95 % confidence. How does the decrease in confidence affect the sample size​ required? 99% and 95%
A doctor wants to estimate the HDL cholesterol of all​ 20- to​ 29-year-old females. How many...
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 22 points with 99% confidence assuming sigma equals 15.2 question mark σ=15.2? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size​ required? A​ 99% confidence level requires A 90% confidence level require
A doctor wants to estimate the HDL cholesterol of all? 20- to? 29-year-old females. How many...
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 3 points with 99 % confidence assuming sigma equals 15.7 question mark Suppose the doctor would be content with 90 % confidence. How does the decrease in confidence affect the sample size? required?
A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many...
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 ?=15.4? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required? A 99% confidence level requires subjects. (Round up to the nearest whole number as needed.)
A doctor wants to estimate the HDL cholesterol of all 20- to 29-year-old females. How many...
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 22 points with 99% confidence assuming σ=11.1? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required? A 99% confidence level requires ______ subjects.
A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How...
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 33 points with 99 %99% confidence assuming s equals 11.2s=11.2 based on earlier​ studies? Suppose the doctor would be content with 95 %95% confidence. How does the decrease in confidence affect the sample size​ required? A​ 99% confidence level requires ____subjects. A​ 95% confidence level requires ____subjects.
A doctor wants to estimate the HDL cholesterol of all​ 20- to​ 29-year-old females. How many...
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 σ= 10.1? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size​ required? A 99% confidence level requires how many subjects?
A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How...
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 33 points with 99 %99% confidence assuming s equals 16.6s=16.6 based on earlier​ studies? Suppose the doctor would be content with 90 %90% confidence. How does the decrease in confidence affect the sample size​ required?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT