Mean, Median, Mode, Standard Deviation
Mean, median and mode for raw data, frequency tables and grouped data (with the interpolation formulas for the median and mode), population and sample variance and standard deviation with the shortcut formula, the effect of shifting and scaling data, combined mean and variance of two groups, which centre minimises which error, the order of mean, median and mode under skew, the coefficient of variation and range, with every value computed exactly by script.