Mean spending for all shoppers

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A marketing researcher wants to estimate the mean amount spent? ($) on a certain retail website by members of the? website's premium program. A random sample of 100 members of the? website's premium program who recently made a purchase on the website yielded a mean of ?$1600 and a standard deviation of ?$250.

Construct a 90?% confidence interval estimate for the mean spending for all shoppers who are members of the? website's premium program.

Reference no: EM132917713

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