A retailer seeking to study store loyalty limited its sample to credit-card holders whose last name began with the letters A through G.The firm used a probability sample.

Question

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A probability sample requires that every member of the population has a known, non-zero chance of being selected. Limiting the sample to credit-card holders with last names A through G does not meet this criterion, as it excludes a large portion of the population.

A Retailer Seeking to Study Store Loyalty Limited Its Sample