Suppose that two population proportions are being compared to test whether there is any difference between them.Assume that the test statistic has been calculated to be z = 2.21.Find the p-value for this situation.
A)p = 0.0136
B)p = 0.4864
C)p = 0.0272
D)p = 0.9728

Question

Quizplus · Accepted Answer

Using a standard normal distribution table, a z-score of 2.21 corresponds to a p-value of approximately 0.0272. This means that the probability of observing a test statistic as extreme as 2.21 or more extreme, assuming the null hypothesis is true, is about 0.0272. Therefore, there is evidence to reject the null hypothesis at a significance level of 0.0272 or smaller, indicating that there is a significant difference between the two population proportions being compared.

Suppose That Two Population Proportions Are Being Compared to Test