TABLE 10-10 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 15

Multiple Choice

TABLE 10-10
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course would like such a course. The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let π₁ and π₂ represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively.
-Referring to Table 10-10, if the firm wanted to test whether a greater proportion of workers would currently like to attend a self-improvement course than in the past, which represents the relevant hypotheses?

• A) H₀: π₁ - π₂ = 0 versus H₁: R₁ - π₂ ≠ 0
• B) H₀: π₁ - π₂ ≠ 0 versus H₁: R₁ - R₂ = 0
• C) H₀: π₁ - π₂ ≤ 0 versus H₁: R₁ - R₂ > 0
• D) H₀: π₁ - π₂ ≥ 0 versus H₁: R₁ - R₂ < 0

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Definitions:

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Substances that can prevent or slow the damage to cells caused by free radicals, unstable molecules that the body produces as a response to environmental and other pressures.

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Highly reactive molecules with unpaired electrons that can cause damage to cells, proteins, and DNA by stealing their electrons through a process called oxidation.