Different ways of displaying data: boxplots, histograms and distributions.

Things you need to know before looking at the statistics courses here.

Statistical data vary: range and inter-quartile range measure this. Are they good measures?

Understanding the summation sign: what does it do … why does it exist?

One of the most common statistical distributions is the normal distribution. What does it tell us and how do we use it?

A standard way of measuring statistical variability: standard deviation and the associated concepts of variance and degrees of freedom.

Statistical data have a tendency to cluster around some central point. How do we determine this point? Is there just one way of doing it or more than one?