A National Manufacturer of Ball Bearings Is Experimenting with Two

question 29

Multiple Choice

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. Given the following MegaStat printout, what analysis and decision can be
Made?

• A) Reject the null hypothesis and conclude the means are different.
• B) Reject the null hypothesis and conclude the means are the same.
• C) Fail to reject the null hypothesis at the 1% level of significance.
• D) Fail to reject the null hypothesis at the 5% level of significance and conclude the means are different.

---

Definitions:

Puncture-Proof Container

A container designed to resist being punctured, commonly used for the safe disposal of sharp objects like needles.

Circular Motions

Movement in a curved path or a loop, often utilized in physical exercises or mechanical processes.

Acute

Describing a condition that has a rapid onset, severe symptoms, and a relatively short duration.

Infectious Disease Process

The mechanisms through which infectious diseases are spread, develop, and affect the body.