When testing , the observed value of the z-score was found to be -2.15. Then, the p-value for this test would be
A) .0158
B) .0316
C) .9842
D) .9864
E) .9964

Question

When testing  , the observed value of the z-score was found to be -2.15. Then, the p-value for this test would be
A) .0158 
B) .0316 
C) .9842 
D) .9864 
E) .9964

Quizplus · Accepted Answer

The p-value is equal to the area under the curve to the left of the observed z-score. Looking at a standard normal distribution table or using a calculator, the area to the left of -2.15 is approximately 0.0316. Therefore, the p-value for this test is 0.0316 or 3.16%. The best choice for the answer is B.

When Testing , the Observed Value of the Z-Score