SCENARIO 10-12 A Quality Control Engineer Is in Charge of the Manufacture

question 151

Short Answer

SCENARIO 10-12
A quality control engineer is in charge of the manufacture of USB flash drives.Two different processes can be used to manufacture the flash drives.He suspects that the Kohler method produces a greater proportion of defects than the Russell method.He samples 150 of the Kohler and 200 of the Russell flash drives and finds that 27 and 18 of them,respectively,are defective.If Kohler is designated as "Group 1" and Russell is designated as "Group 2," perform the appropriate test at a level of significance of 0.01.
-Referring to Scenario 10-12,construct a 90% confidence interval estimate of the difference in proportion between the Kohler and Russell flash drives that are defective.

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Definitions:

Brands

Symbols, names, or designs that identify and differentiate products or services from those of competitors.

Postpurchase Stage

A phase in the consumer decision process that involves the evaluation of a purchased product and the experience of using it.

Purchase Decision Process

The stages a consumer goes through before, during, and after buying a product, including problem recognition, information search, evaluation of alternatives, purchase decision, and post-purchase behavior.

Consumer Expectations

The beliefs or standards that customers hold regarding the performance or qualities of products or services they purchase.