Skill: Calculate the range

The range tells how spread out a set of data is.

To find the range:

1. Find the greatest value.
2. Find the least value.
3. Subtract the least value from the greatest value.

$$\text{Range}=\text{greatest value}-\text{least value}$$

Example: Find the range of the data set:

$$6,\ 3,\ 9,\ 5,\ 7$$

• The greatest value is $9$.
• The least value is $3$.
• Subtract:

$$9-3=6$$

The range is $6$.

Remember, the range is the difference between the greatest and least values. It is not the number of values in the data set.