A certain gym selected a random sample of 10 customers and monitored the number

Question

A certain 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 data are shown in the table below. The gym'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. 15 16 18 16 19 18 19 10 12 17 The minimum number of visits required to receive a gift is nothing. (Type a whole number.)

Explanation / Answer

Sol:

code in R to get mean and sd:

gift <- c(15 ,16 ,18, 16 ,19 ,18, 19, 10 ,12 ,17 )
mean(gift)
sd(gift)

output:

> mean(gift)
[1] 16
> sd(gift)
[1] 2.981424

mean+sd=16+2.981424=18.98142

The minimum number of visits required to receive a gift is =19

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