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

Since it is a two-tail test, we need to find the area in both tails of the standard normal distribution. A z-score of 2.05 indicates that the test statistic is 2.05 standard deviations away from the mean. Looking at the standard normal distribution table, the area in the tail to the right of 2.05 is 0.0202. However, we need to find the total area in both tails, so we need to double this value to get the p-value, which is 0.0404. Therefore, the answer is B.

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