A survey of drivers began by randomly sampling from all listed residential telephone numbers in the United
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A survey of drivers began by randomly sampling from 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. Describe how nonresponse might lead to bias in this study. Explain the likely direction of the bias.
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