A national magazine marketing firm attempts to win subscribers with a mail campaign that involves a contest using magazine stickers. Often when people subscribe to magazines in this manner they sign up for multiple magazine subscriptions. Suppose the marketing firm wants to estimate the average number of subscriptions per customer of those who purchase at least one subscription. To do so, the marketing firm’s researcher randomly selects 27 entries with subscription requests. Of these, the average number of subscriptions is 2.10, with a standard deviation of .86.The researcher uses this information to compute a 98% confidence interval to estimate µ and assumes that x is normally distributed. What does the researcher find?

  • CreatedFebruary 19, 2015
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