TABLE 10-11 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 78

Multiple Choice

TABLE 10-11
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 10-11, what is/are the critical value(s) when testing whether the current population proportion is higher than before if α= 0.05?

• A) ± 1.645
• B) + 1.645
• C) ± 1.96
• D) + 1.96