Which statement is incorrect? Explain.
A)If p = 0.50 and n = 100,the standard error of the sample proportion is 0.05.
B)In a sample size calculation for estimating π,it is conservative to assume π = 0.50.
C)If n = 250 and p = 0.06,we cannot assume normality in a confidence interval for π.

Question

Quizplus · Accepted Answer

The assumption of normality for a confidence interval for π is valid if np(1-p) is greater than or equal to 10. In this case, np(1-p) = 250 * 0.06 * 0.94 = 14.1, which is greater than 10, so normality can be assumed.

Which Statement Is Incorrect? Explain