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What is the mean number of minutes of usage per month

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J.D. Powers and Associates surveyed cell phone users in order to learn about the minutes of cell phone usage per month (Associated Press, June 2002). Minutes per month for a sample of 15 cell phone users are shown here.

615, 135, 405, 420, 820, 1,180, 700, 240, 410, 255, 245, 200, 190, 390, 95

1. What is the mean number of minutes of usage per month?

2. What is the median number of minutes of usage per month?

3. What is the 85th percentile?

Reference no: EM132367351

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