Math Solutions

[See Solution] Direct satellite TV: It is believed that 25% of the U.S. Homes have a direct satellite television receiver, how large of a sample is necessary

Question: Direct satellite TV: It is believed that 25% of the U.S. Homes have a direct satellite television receiver, how large of a sample is necessary to estimate the true proportion of homes which do with 95% confidence and within three percentage points? How large a sample is necessary if nothing is known about the proportion?

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