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 made by the company over the past 12 months are satisfied with their products. If there are 4 different types of videocassette recorders made by the company, the best strategy would be to use a

b. stratified random sample.

Explanation:

In Stratified random sampling, it divides the overall population into same type of groups that we called as strata. In this the random samples would be chosen from each and every stratum.

Since the videocassette recorded would be purchased over the past 12 months, and there is different types of videocassette records

So here the best strategy would be stratified random sample

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