We learn how to draw and use a cumulative frequency diagram to find the median, lower and upper quartiles, the interquartile range, 90th percentile and how to use the diagram to draw a box plot.

******* TIME STAMPS / CHAPTERS *******

00:00 Introduction
00:50 Cumulative Frequency Column
02:13 Plotting Points & Curve for Cumulative Frequency Diagram
04:33 Median Value
05:55 Lower & Upper Quartile
07:37 Interquartile Range
08:02 Median at n/2 or (n+1)/2 ?
09:03 Box Plot
10:22 90th Percentile (How to Find it)
11:54 Percentage Measuring Less than 32cm