Listed below are the arrival delay times(in minutes) of randomly selected airplane flights from one airport to another. Negative values correspond to flights that arrived early before the scheduled arrivaltime, and positive values represent lengths of delays. Find therange, variance, and standard deviation for the set of data. Some of the sample values arenegative, but can the standard deviation ever benegative?

9

13

2

24

7

15

6

The range of the sample data is ______ minutes.

(Round to one decimal place asneeded.)