To determine which data set has the least variability, we can compare their standard deviations. The standard deviation is a measure of the amount of variation or dispersion in a set of values. A lower standard deviation indicates less variability.
The standard deviations for the data sets are as follows:
- Data set 1: Standard deviation = 1.23
- Data set 2: Standard deviation = 1.42
- Data set 3: Standard deviation = 1.19
Among these, data set 3 has the lowest standard deviation of 1.19, which indicates that it has the least variability.