When the necessary conditions are met, a two-tail test is being conducted to test the difference between two population proportions. If the value of the test statistic Z is 2.05, then the p-value is:
A)0.4798.
B)0.0404.
C)0.2399.
D)0.0202.

Question

Quizplus · Accepted Answer

Using a standard normal distribution table, we find that the probability of getting a Z-value of 2.05 or greater (in either tail) is approximately 0.0204. Since this is a two-tailed test, we double this probability to get the p-value of 0.0408. Therefore, the best choice is B (which is the closest option to 0.0408).

When the Necessary Conditions Are Met, a Two-Tail Test Is