They are sometimes used.
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The range is 12 and the standard deviation is 3.822448314.
The range is 9 and 3.01 is the standard deviation.
The standard deviation is better since it takes account of all the information in the data set. However, the range is quick and easy to compute.
Standard deviation shows how much variation there is from the "average" (mean). A low standard deviation indicates that the data points tend to be very close to the mean, whereas high standard deviation indicates that the data are spread out over a large range of values.
5