Determine the Critical Value, ZO to Test the Claim

Multiple Choice

Determine the critical value, ZO to test the claim about the population proportion p=0.250 given n=48 and $\hat { \mathrm { p } } = 0.231 . \text { Use } \alpha = 0.01$

A) $\pm 2.575$
B) $\pm 1.96$
C) $\pm 1.645$
D) $\pm 2.33$