Question 3.
The CEO of a car financing firm has budgeted for a training program for the company employees for the given budget year. He wants to know the type of training lower-level firm employees would prefer. The firm has the following number of lower-level employees in three departments as shown in the table. The CEO believes that a sample of 70 employees (equal to 20 percent of total employees) would adequately provide information on the type of training relevant to the employees.
HR department Accounting Department Marketing department: Sales representatives Total number of employees
35 15 300 350
Based on the information given in the table, briefly explain how the CEO would use stratified sampling to obtain a sample (of size n=70). Clearly indicate the strata you would use, whether proportionate or disproportionate stratified sampling is more appropriate and why