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Gold’s Gym selected a random sample of 10 customers and monitored the number of times each customer used the workout facility in a one-month period. The following data were collected:
10 19 17 19 12 20 20 15 16 13
Gold’s managers are considering a promotion in which they reward frequent users with a small gift. They have decided that they will only give gifts to those customers whose number of visits in a one-month period is 1 standard deviation above the mean. Find the minimum number of visits required to receive a gift.
The registrar at Whitworth College has been asked to prepare a report about the graduate students. Among other things, she wants to analyze the ages of the students. She has taken a sample of 10 graduate students and has found the following ages:
32 22 24 27 27 33 28 23 24 21
a. Compute the range, interquartile range, and standard deviation for these data.
b. An earlier study showed that the mean age of graduate students in U.S. colleges and universities is 37.8 years. Based on your calculations in part a, what might you conclude about the age of students in Whitworth’s programs?