Question

In determining the sample size necessary to estimate a population proportion, which one of the following would not come into play?

	A.	a planning estimate p* of the true population proportion p
	B.	the population standard deviation
	C.	the maximum margin of error that can be tolerated
	D.	the desired level of confidence

Answer 1

• Answer is B

  B.	the population standard deviation

Explanation: To get sample size necessary to estimate a population proportion we use formula of margin of error that is given by

where

• is can be calculated using level of confidence
• p* is estimate of true population proportion
• Margin of error is the error tha can be tolerated

So we can see we are not using population standard deviation anywhere so B is the answer