Mathematics, 16.04.2020 00:00 daniel9299
An advertising agency that manages a major radio station wants to estimate the mean amount of time that the station’s audience spends listening to the radio on a daily basis. From past studies, the standard deviation is assumed to be 20 minutes. What sample size is needed if the agency wants to have a 95% confidence interval with a margin of error equal to 5 minutes?
Answers: 1
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