TABLE 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 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 12-1, what is the critical value when testing whether the population proportions are different if α = 0.10?
A) ±1.645
B) ±1.96
C) 3.842
D) 2.706

Question

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The Answer of TABLE 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 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 12-1, what is the critical value when testing whether the population proportions are different if α = 0.10?
A) ±1.645
B) ±1.96
C) 3.842
D) 2.706

TABLE 12-1 A Corporation Randomly Selects 150 Salespeople and Finds That 66