A National Manufacturer of Ball Bearings Is Experimenting with Two

question 30

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. What are the degrees of freedom?

• A)10
• B)13
• C)26
• D)24

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Definitions:

Opportunity Costs

The cost of missing out on the top alternative by deciding on another option.

Scarce Resources

Natural, human, and artificial resources that are limited in supply and cannot satisfy all human wants and needs.

Secondary Effects

The unintended consequences of economic actions, which can occur as indirect results of a policy or event.

Economic Actions

Decisions or behaviors taken by individuals, firms, or governments that affect the production, distribution, and consumption of goods and services.