Problem 7.51 - P roblem 7.51 A survey sponsored by the...

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Problem 7.51 A survey sponsored by the American Dietetic Association and the agribusiness giant conAgra found that 53% of office workers take 30 minutes or less for lunch each day. Approximately 37% take 30 to 60 minutes, and 10% take more than an hour (data extracted from “Snapshots,” www.usatoday.com , April 26, 2006). a. What additional information would you want to know before you accepted the results of the survey? Before accepting the results of the survey, I would want to know the purpose of the survey, why it was conducted, and for whom it was conducted. I would also want to know whether the survey was based on a probability or non-probability sample. Types of non-probability samples are: convenience and judgment. In a convenience sample, items are selected based only on the fact that they are easy, inexpensive, or convenient to sample. In a judgment sample, you get the opinions of pre-selected experts in the subject matter. Types of probability samples are: Simple random,
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This note was uploaded on 05/26/2011 for the course DS 300 taught by Professor Zhixinlui during the Winter '11 term at University of Michigan-Dearborn.

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Problem 7.51 - P roblem 7.51 A survey sponsored by the...

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