Question 461188
Assume that a sample is drawn and z(α/2) = 1.65 and σ = 30. Answer the following questions:
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Note: n = [zs/E]^2
or
E = zs/sqrt(n)
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(A)If the Maximum Error of Estimate is 0.05 for this sample, what would be the sample size?
n = [1.65*30/0.05]^2 
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(B)Given that the sample Size is 400 with this same z(α/2) and σ, what would be the Maximum Error of Estimate?
E = 1.65*30/sqrt(400)
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(C)What happens to the Maximum Error of Estimate as the sample size gets larger?
ME and n are inversely related so the ME would get smaller
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(D) What effect does the answer to C above have to the size of the confidence interval?
The confidence interval is ALWAYS 2*ME so the confidence interval
would get smaller.
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Cheers,
Stan H.