Instruction 15-5 A Corporation Randomly Selects 150 Salespeople and Finds That 66

Multiple Choice

Instruction 15-5
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 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 Instruction 15-5,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