Instruction 7-5 The Manager of the Customer Service Division of a Major

Multiple Choice

Instruction 7-5
The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a DVD player made by the company over the past 12 months are satisfied with their products.
-Referring to Instruction 7-5,if there are 4 different brands of DVD players made by the company,the best sampling strategy would be to use a

A) a systematic sample.
B) a stratified sample.
C) a simple random sample.
D) a cluster sample.