Nonresponse A survey of drivers began by randomly sampling all listed residential telephone numbers in the United
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Nonresponse A survey of drivers began by randomly sampling all listed residential telephone numbers in the United States. Of 45,956 calls to these numbers, 5029 were completed. The goal of the survey was to estimate how far people drive, on average, per day.15
(a) What was the rate of nonresponse for this sample?
(b) Explain how nonresponse can lead to bias in this survey. Be sure to give the direction of the bias.
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