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 the unbiased point estimate for the difference between the two population proportions?
A) 0.10
B) 0.06
C) 0.22
D) 0.15

Question

Quizplus · Accepted Answer

The unbiased point estimate for the difference between the two population proportions is given by:
(p₁ - p₂)̂ = p̂₁ - p̂₂ = 0.66 - 0.60 = 0.06
Therefore, the best choice is B.

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