The ages (in years) of a random sample of shoppers at a gaming store are shown. Determine the range, mean, variance, and standard deviation of the sample data set.

12

,

21

,

23

,

13

,

20

,

16

,

22

,

16

,

15

,

15

The range is

nothing

.

(Simplify your answer.)

The mean is

nothing

.

(Simplify your answer. Round to the nearest tenth as needed.)

The variance is

nothing

.

(Simplify your answer. Round to the nearest hundredth as needed.)

The standard deviation is

nothing

.

(Simplify your answer. Round to the nearest tenth as needed.)