A bookstore wants to determine how many books the people in the surrounding neighborhood read per month on average. They survey each customer who enters their store for one week. Identify any bias in this method. If appropriate, suggest a method more likely to produce a random sample.
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Question

anonymous · Answer

The bias is that the bookstore is only carrying out this survey among their customers, when they want to determine how many books the people in the surrounding neighborhood read per month on average (they should be carrying out the survey among their target group (the residents of the neighborhood).) The method more likely to produce a random sample is the systemic method (carried out in the surrounding neighborhood.)