In testing a hypothesis about a population proportion p, the z test statistic measures how close the computed sample proportion has come to the hypothesized population parameter.

Question

In testing a hypothesis about a population proportion p, the z test statistic measures how close the computed sample proportion  has come to the hypothesized population parameter.

Quizplus · Accepted Answer

The z test statistic is computed as (p̂ - p) / sqrt(p(1-p)/n), where p̂ is the sample proportion, p is the hypothesized population parameter, and n is the sample size. Therefore, the z test statistic measures how many standard errors the sample proportion is from the hypothesized population proportion. A large absolute value of the z test statistic indicates that the sample proportion is much different from the hypothesized population proportion, while a small absolute value indicates that they are similar.

In Testing a Hypothesis About a Population Proportion P, the Z