Instruction 10-12
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 π 1 and π 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 Instruction 10-12,what is/are the critical value(s)when testing whether population proportions are different if α = 0.10?
A) -1.96
B) ± 1.645
C) ± 2.08
D) ± 1.96

Question

Quizplus · Accepted Answer

For a two-tailed test with α = 0.10, the critical values correspond to the z-scores that cut off the outer 5% in each tail of the standard normal distribution, which are ±1.645.

Instruction 10-12 A Corporation Randomly Selects 150 Salespeople and Finds That 66