Measures of Variability Introduction

Measures Of Variability Introduction

Introduction

Data sets can have similar centers but different spreads. Measures of variability describe how spread out the values are and how much they differ from one another.

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A teacher records the time it takes eight students to complete an activity and wants to understand how spread out their completion times are.

To understand this, she uses two measures of variability: the interquartile range and mean absolute deviation.

She first arranges the times from least to greatest and divides the data into a l...