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:

Problem-focused Coping

A coping strategy targeting the causes of stress in practical ways, aiming to reduce or eliminate the stressors.

Explanatory Style

An individual's habitual way of explaining events, especially the causes of adverse events, which can influence their psychological health.

Internal Attributions

The inference that a person's behavior is due to their own internal characteristics, such as personality, beliefs, or efforts, rather than external circumstances.

External Attributions

The process of explaining one's own behavior or the behavior of others by pointing to causes outside the individual, such as situational factors.