A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings.It is important that the diameters be as close as possible to an industry standard.The output from each process is sampled and the average error from the industry standard is calculated.The results are presented below. The researcher is interested in determining whether there is evidence that the two processes yield different average errors.Assume that the population standard deviations are equal. What is the alternate hypothesis?
A)Option A
B)Option B
C)Option C
D)Option D

Question

A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings.It is important that the diameters be as close as possible to an industry standard.The output from each process is sampled and the average error from the industry standard is calculated.The results are presented below.  The researcher is interested in determining whether there is evidence that the two processes yield different average errors.Assume that the population standard deviations are equal. What is the alternate hypothesis? 
A)Option A 
B)Option B 
C)Option C 
D)Option D

Quizplus · Accepted Answer

The alternate hypothesis is a statement that contradicts the null hypothesis. In this case, the null hypothesis is that the two processes yield the same average error, and the alternate hypothesis is that the two processes yield different average errors. Option B is the correct statement of the alternate hypothesis. Option A implies that the average error from one process is less than the other, which is not the same as saying they are different. Option C implies that the average error from one process is greater than the other, which is also not the same as saying they are different. Option D does not provide a statement that contradicts the null hypothesis.

A National Manufacturer of Ball Bearings Is Experimenting with Two