A National Manufacturer of Ball Bearings Is Experimenting with Two

question 19

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 measured in millimeters. The results are presented here. The researcher is interested in determining whether there is evidence that the two processes yield different average errors. The population standard deviations are unknown but are assumed equal. This example is what type of test?

• A)A one-sample test of means
• B)A two-sample test of means
• C)A paired t-test
• D)A test of proportions

---

Definitions:

Outcome Objectives

Specific goals set to measure the effectiveness of a program or intervention.

Service Coordinator

A service coordinator is a professional who assists individuals and families in accessing necessary services and supports, often in health care, education, or social services settings.

Exceptionalities

refers to individuals who differ significantly from the norm, either through disability or giftedness, requiring special educational services.

Natural Environments

Settings or places that are not significantly altered by human activity, where the ecological systems function in a relatively undisturbed state.