In National 4 Lifeskills Maths use statistics to analyse and compare data sets using mean, median, range, inter-quartile range, and standard deviation.

The empirical rule describes how points are clustered in a normally-distributed data set. It states that 95% of data fall within two standard deviations of the mean.

Understanding mean, median, mode and range is essential to be able to compare sets of data. Watch the video to hear Steph, a sports coach, talk about why collecting and comparing data is useful ...

Winsorized mean is an averaging method that involves replacing the smallest and largest values of a data set with the observations closest to them.