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

question 72

Multiple Choice

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, the hypotheses that should be tested are

• A) H₀: π₁ - π₂ = 0 versus H₁: π₁ - π₂ ≠ 0.
• B) H₀: π₁ - π₂ ≠ 0 versus H₁: π₁ - π₂ = 0.
• C) H₀: π₁ - π₂ ≤ 0 versus H₁: π₁ - π₂ > 0.
• D) H₀: π₁ - π₂ ≥ 0 versus H₁: π₁ - π₂ < 0.

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Definitions:

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Original devices, methods, or processes developed from the creative mind that have never been made before, offering new solutions.

Idea

A thought or suggestion about a possible course of action, creative concept, or invention.

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A set of circumstances that makes it possible to do something or for something to happen, often leading to potential benefits.

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Promptness in recognizing and reacting to new information or changes in the environment.