Instruction 15-5 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 103

Multiple Choice

Instruction 15-5
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 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 Instruction 15-5,what is the critical value when performing a chi-square test on whether population proportions are different if α = 0.05?

• A)± 1.645
• B)± 1.96
• C)2.706
• D)3.842

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Definitions:

Difference-In-Differences

A statistical technique used in econometrics and quantitative research to determine the effect of a specific intervention or treatment by comparing the before-and-after differences in outcomes between a control group and a treatment group.

Causal Effects

The relationship or impact that one variable has in directly changing the value or outcome of another variable.

Policy

A course or principle of action adopted or proposed by an organization or individual.

Causation

The relationship between cause and effect where one event directly results in another.