The Jamestown Steel Company Manufactures and Assembles Desks and Other

question 9

Multiple Choice

The Jamestown Steel Company manufactures and assembles desks and other office equipment at several plants. The weekly production of the Model A325 desk follows a normal probability distribution, with a mean of 200 and a standard deviation of 16. Recently, due to market expansion, new production methods have been introduced and new employees hired. The vice president of manufacturing would like to investigate whether there has been an increase in the weekly production of the Model A325 desk. The mean number of desks produced last year (50 weeks, because the plant was shut down two weeks for vacation) is 203.5. Is the mean number of desks increased from 200? Test using the.10 significance level.

• A) Reject the null hypothesis; there is sufficient evidence to indicate an increase in the weekly production.
• B) Unable to reject the null hypothesis; there is sufficient evidence to indicate a change in weekly production.
• C) Unable to reject the null hypothesis; there is insufficient evidence to indicate an increase in weekly production.
• D) Reject the null hypothesis; there is insufficient evidence to indicate a change in the weekly production.

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Definitions:

Standard Deviation

A statistical measure that quantifies the amount of variation or dispersion of a set of data values around the mean of the data.

Independent Variable

The experimental or control conditions in an experiment.

Psychology Midterm

An examination that typically occurs in the middle of an academic term or semester, assessing students' knowledge and understanding of psychological concepts.

Informed Consent

The process by which a fully informed person can participate in choices about their care or participation in research, based on understanding the risks, benefits, and alternatives involved.