A Sample of 25 Observations Is Taken from a Process $\bar { p }$

Multiple Choice

A sample of 25 observations is taken from a process (an infinite population) . The sampling distribution of $\bar { p }$ is _____.

A) not normal since n < 30
B) approximately normal because $\bar { p }$ is always normally distributed
C) approximately normal if np ? 5 and n(1 - p) ? 5
D) approximately normal if np > 30 and n(1 - p) > 30