Understanding Quartiles and Box Plots for Data Analysis

The video tutorial explains the concept of quartiles and box plots, focusing on the interquartile range (IQR) as a measure of data spread. It demonstrates how to use cumulative frequency graphs to determine quartiles and calculate the IQR. The tutorial also covers how to visualize data using box plots and compare different data sets by analyzing their medians, IQRs, and ranges.

What does a smaller interquartile range indicate about a data set?

Discuss the relationship between the median and the interquartile range in the context of comparing boys' and girls' performance.