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A key metric in the cell phone industry is average revenue per user ARP which represents the average dollar amount that a customer spends per store visit. In 2011 AT&T reported their ARPU was

A key metric in the cell phone industry is average revenue per user (ARPU) which represents the average dollar amount that a customer spends per store visit. In 2011, AT&T reported their ARPU was $63.76. Suppose the standard deviation for this population is $22.50. What is the probability that the ARPU will be between $60 and $63 from a random sample of 38 customers?

Apr 06 2020 View more View Less

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