Solution-Mean amount of time of audience who listen radio

Mean amount of time of audience who listen radio daily

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Question: An advertising agency that serves a major radio station wants to estimate the mean amount of time that the stations audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes.

a. What sample size is needed if the agency wants to be 90% confident of being correct to within 5 minutes?

b. If 99% confidence is desired, what sample size is necessary?

Reference no: EM131689439

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Mean amount of time of audience who listen radio daily

Reference no: EM131689439

Reference no: EM131689439

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