TABLE 12-5 A Corporation Randomly Selects 150 Salespeople and Finds That 66

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 testing whether population proportions are different if α = 0.10?

A) 2.706
B) ±1.645
C) 3.842
D) ±1.96