Identify representative, random, and biased samples
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While designing a new dessert menu, the manager of a restaurant offered customers a coupon in exchange for completing a survey about their favorite desserts. 25 customers accepted the offer. Is this sample likely to be representative?
No. Since the customers who agreed to take the survey may not be similar to customers who did not agree, the sample is likely to be biased.
Patrick questioned the first 47 diners to arrive at the restaurant. Is this sample of the diners at the restaurant likely to be representative?
No. Since diners who arrive early to the restaurant may not be similar to those who arrive later, the sample is likely to be biased.
Linda surveyed 7 elementary school students in a regional spelling bee. Is this sample of elementary school students likely to be biased?
No. Since students in a spelling bee might not be similar to the other elementary school students, it is likely to be a biased sample.
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