Using stratified sampling, compute and complete the solution below:

A call center company wants to seek suggestions of their agents for a new marketing strategy for their new services with total population of 5,000 agents. The desired sample size is 500. Variable of interest is age and there are three subgroups under 30, 30 to 45 and over 45, with a sample of 20%, 65% and 15% respectively. Solution:

1. We classify the agents (5000) into the subgroups: 20% are under age of 30 or = ___ 65% are age 30 to 45 or = ____ 15% are over age 45 or = ___

2. We want 500 agents. Since we want proportional representation. 20% of the sample under age 30= ____ 65% should be age 30 to 45 = ___ 15% should be over age 45 = ____

Conclusion: