The managers of a large company wish to know the percentage of employees who feel "extremely satisfied" to work there. The company has roughly 35,000 employees. Match each of the sampling designs described in parts a through d to one of the sampling methods below:

SIMPLE RANDOM SAMPLE

STRATIFIED SAMPLE

CLUSTER SAMPLE

SYSTEMATIC SAMPLE

a. The managers select a single branch of the company at random and survey every employee of that branch.

b. The managers use the company email directory to contact every 120th employee on the list.

c. The managers split the company into divisions, each containing employees that have similar jobs. Within each division, they select a simple random sample of employees to contact.

d. The managers assign a number to every employee in the company email directory, then randomly select 300 numbers and contact the employees associated with those numbers.