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,in testing the difference between two proportions using the normal distribution,you may use a two-tailed Z test.

Question

Quizplus · Accepted Answer

Since the sample sizes are large enough and the groups are assumed to be independent, we can use a normal distribution to test the difference between two proportions. A two-tailed Z test would be appropriate in this case.

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