Now that you know all about how to represent data — in histograms, dot plots, bar charts, stem plots, and box plots — we can look at how to describe and compare them. This tutorial will cover how to describe distributions in terms of their shape, centre and spread, and whether there are any outliers [...]

This tute shows you how to construct boxplots, how to gather the five-figure summary that you need for a boxplot, how to distinguish outliers, how to interpret boxplots, and how to compare them side-by-side. It covers the gamut really — everything you ever wanted to know about your friendly neighbourhood boxplot all wrapped up in [...]

Summary statistics is a fairly big and rather important topic, so I’ve split this into four videos. Part 1 explains mean and mode, part 2 looks at calculating the median, part 3 covers range and interquartile range (IQR) and part four shows you how to calculate standard deviation and variance. [Update - I've put another [...]