TABLE 12-5 a Corporation Randomly Selects 150 Salespeople and Finds That

question 179

Multiple Choice

TABLE 12-5
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 u₁ and u₂ 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 12-5, what is the critical value when performing a chi-square test on whether population proportions are different if ? = 0.05?

• A) ±1.645
• B) ±1.96
• C) 2.706
• D) 3.841

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Definitions:

Nontreatment Effects

Outcomes or changes that occur independently of the specific treatment or intervention being evaluated, often due to placebo effect, participant expectations, or other external factors.

Secondary Drug Effects

Unintended effects of medication that occur in addition to the desired therapeutic effects, which may be beneficial, neutral, or harmful.

Independent Variable

In a study, the variable that is altered or controlled by the scientist to examine its impact on the dependent variable.

Experimenter Bias

A process where the scientists performing the research influence the results, consciously or unconsciously, in a way that introduces errors or specific outcomes.