Title: WATCH: Measures of Center and Spread
Course: Algebra 2 (B)

5

Measures of Center

Range and IQR

Standard Deviation

More Examples

When to use which Measures of Spread

Use the interquartile range when data is skewed or when there are outliers.
- The range and standard deviation are more affected by outliers than the IQR.

Use the range or standard deviation when data is unimodal and symmetric.

Percentiles