In Selecting the Sample Size to Estimate the Population Proportion $\hat { p }$

Multiple Choice

In selecting the sample size to estimate the population proportion p, if we have no knowledge of even the approximate values of the sample proportion $\hat { p }$ , we:

A) take another sample and estimate p.
B) take two more samples and find the average of their $\hat { p }$ values.
C) let $\hat { p }$ = 0.50.
D) let $\hat { p }$ = 0.95.