TABLE 10-13 A Quality Control Engineer Is in Charge of the Manufacture

question 32

Short Answer

TABLE 10-13
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 10-13, construct a 90% confidence interval estimate of the difference in proportion between the Kohler and Russell disks that are defective.

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Definitions:

Military Goods

Products and materials used or consumed by the armed forces, such as weapons, equipment, and uniforms.

Civilian Goods

Products and services that are produced and intended for use by civilians rather than military or defense purposes.

Opportunity Cost

Opportunity cost represents the value of the next best alternative that must be foregone when making a decision, highlighting the trade-off between different choices.

Submarines

Underwater naval vessels capable of extensive underwater operations.