When testing the observed value of the Z test statistic was found to be - 2.13.The p-value for this test is
A)0.0166.
B)0.0332.
C)0.9668.
D)0.9834.

Question

When testing  the observed value of the Z test statistic was found to be - 2.13.The p-value for this test is
A)0.0166. 
B)0.0332. 
C)0.9668. 
D)0.9834.

Quizplus · Accepted Answer

A negative Z test statistic corresponds to a left-tailed test. Using a standard normal distribution table or calculator, the area to the left of -2.13 is 0.0166. This is the p-value for the test. Therefore, option A is the correct answer. With a Z test statistic of -2.13, we need to find the area under the standard normal distribution curve to the left of -2.13 since it is a left-tailed test. Using a standard normal distribution table or calculator, we find that this area is approximately 0.0166. Therefore, the p-value for this test is 0.0166.

When Testing the Observed Value of the Z Test