A National Manufacturer of Ball Bearings Is Experimenting with Two

question 71

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.
What is the computed value of t?

• A) +2.797
• B) -2.797
• C) -13.905
• D) +13.70

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Definitions:

Rank Order

A method of organizing items in a list based on their value or importance, typically from highest to lowest.

Tie

A situation in competitive scenarios where two or more participants achieve identical results and a common ranking is shared.

Wilcoxon Rank Sum Test

A nonparametric test that compares two independent samples to assess whether their population mean ranks differ.

Marital Status

A demographic variable that describes a person's current state with respect to marriage, such as single, married, divorced, or widowed.