Question

When you calculate the sample size for a proportion, you use an estimate for the population proportion; namely . A conservative value for n can be obtained by using = ______ .
A.0.50
B.0.05
C.0.10
D.0.01

Answer 1

Answer: A. 0.50

Step-by-step explanation:

The formula to find the sample size : $n=p(1-p)(\dfrac{ z^*}{E})$

, where p= Prior estimate of population proportion.

E= Margin of error

z* =Critical z-value.

When , we do not have prior estimate of population proportion , we use p= 0.5 because at p=0.5 it gives the maximum same sample size for the corresponding confidence interval and margin of error.

Therefore , the conservative value for n can be obtained by using p=0.50.

Therefore , the correct answer is A.0.50 .