To find the range of a data set, follow these steps:

1. Identify the highest value (maximum) in the data set.
2. Identify the lowest value (minimum) in the data set.
3. Subtract the lowest value from the highest value.

The formula is:

Range=Highest value−Lowest value\text{Range}=\text{Highest value}-\text{Lowest value}Range=Highest value−Lowest value

For example, if your data set is {19, 21, 26, 29, 31, 33, 36, 37}, the highest value is 37 and the lowest is 19, so the range is:

37−19=1837-19=1837−19=18

This means the range of the data set is 18

. The range measures the spread or variability of the data, showing how far apart the smallest and largest values are. However, it can be misleading if there are extreme outliers, in which case other measures like interquartile range or standard deviation might be more informative