The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a videocassette recorder over the past 12 months are satisfied with their products. If there are 4 different brands of videocassette recorders made by the company, the best sampling strategy would be to use a:
A. simple random sample.
B. stratified random sample.
C. cluster sample.
D. self-selected sample.
Analysis:
A. Incorrect. Stratified random sample is the best sampling strategy.
B. Correct. Stratified random sample is the best sampling strategy.
C. Incorrect. Stratified random sample is the best sampling strategy.
D. Incorrect. Stratified random sample is the best sampling strategy.
ANSWER : B
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