Question 1:
A country library in Minnesota reported the following number of books checked out in 15 randomly selected months:
5,176 6,005 5,052 5,310 4,188
4,132 5,736 5,381 4,983 4,423
5,002 4,573 4,209 5,611 4,568
Determine the range, variance, and standard deviation for sample data.
Question 2:
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 receive a gift.