Math Solutions

[Steps Shown] An advertising agency that serves as a major radio station wants to estimate the mean amount of time that the station’s audience spends listening

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

  1. What sample size is needed if the agency wants to be 90% confident of being correct to within + 5 minutes?
  2. If 99% confidence is desired, how many listeners need to be selected?

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Solution: The downloadable solution consists of 1 pages
Deliverable: Word Document


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