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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Mogul magazine has recently completed an analysis of its customer base. It has determined that 75% of the issues sold each month are subscriptions and the other 25% are sold at newsstands. It has also determined that the ages of its subscribers are normally distributed with a mean of 44.5 and a standard deviation of 7.42 years, whereas the ages of its newsstand customers are normally distributed with a mean of 36.1 and a standard deviation of 8.20 years
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(a)Â Find the middle 80% range (i.e. range that is symmetrical about the mean) for the age of its subscribers.rs.
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(b) What proportion of Mogul’s newsstand customers have ages in the range computed above?
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(c) What proportion of all of Mogul’s customers have ages in the range given in (a)
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