Television viewers often express doubts about the validity of certain commercials. In an attempt to answer their
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Question:
Television viewers often express doubts about the validity of certain commercials. In an attempt to answer their critics, a large advertiser wants to estimate the true proportion of consumers who believe what is shown in commercials. Preliminary studies indicate that about 40% of those surveyed believe what is shown in commercials. What is the minimum number of consumers that should be sampled by the advertiser to be 97% confident that their estimate will fall within 3% of the true population proportion?
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