Statistics and Probability (Khan Academy)

Sal Khan's original statistics playlist on the Khan Academy channel, worked through on a blackboard one idea at a time. It starts with descriptive statistics, the average, sample versus population mean, population and sample variance, standard deviation and alternative variance formulas, then moves to random variables and probability density functions, the binomial distribution over several parts, expected value and the expected value of a binomial distribution, and the Poisson process. It suits students who want careful worked explanations of the maths behind data analysis. Practise with Khan Academy's free exercises.