SCENARIO 12-1
a Corporation Randomly Selects 150 Salespeople and Finds $\pi$

question 5

Multiple Choice

SCENARIO 12-1
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 $\pi$ 1 and $\pi$ 2 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 Scenario 12-1, what is the critical value when testing whether the population proportions are different if $\alpha$ = 0.10?

• A)\(\pm\) 1.645
• B)\(\pm\) 1.96
• C)3.842
• D)2.706

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