The manager of the quality department for a tire manufacturing company wants to know the average tensile strength of rubber used in making a certain brand of radial tire. The population is normally distributed and the population standard deviation is known. She uses a z test to test the null hypothesis that the mean tensile strength is 800 pounds per square inch. The calculated z test statistic is a positive value that leads to a p-value of .045 for the test. If the significance level (α) for this test is .05, the null hypothesis would be rejected.

Question

Quizplus · Accepted Answer

Since the calculated p-value is less than the significance level, you would reject the null hypothesis.

The Manager of the Quality Department for a Tire Manufacturing