Understanding Box-and-Whisker Plots: Part I

Understanding Box-Whisker-Plot Part I

Introduction

A box-and-whisker plot is a graphical representation used to summarize the center and spread of a data set. The box is especially important because it represents the middle 50% of the values and provides i...

A teacher displayed a box-and-whisker plot showing the time students took to complete a puzzle.

The box-and-whisker plot shows the center, spread, and distribution of a data set.

Let’s first look at the box. It represents the middle 50% of the data and extends from the first quartile, Q1, to the third quartile, Q3.

Q1 marks the...