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

question 183

Short Answer

TABLE 10-12
A quality control engineer is in charge of the manufacture of computer disks. Two different processes can be used to manufacture the disks. 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 disks 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 Table 10-12, construct a 95% confidence interval estimate of the difference in proportion between the Kohler and Russell disks that are defective.

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Definitions:

Problem Recognition

The initial stage of the buying process where a consumer identifies a need or problem that can be satisfied by purchasing a product or service.

Cognitive Dissonance

The mental unease felt by a person when they simultaneously possess conflicting beliefs, ideas, or values.

Internal Search

The process by which consumers use their own memory and knowledge to identify possible choices in purchasing decisions.

External Search

The process consumers engage in by seeking information from sources outside of their personal knowledge base to make informed purchase decisions.