Learn about calculating averages from grouped data with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Stefan H. Steiner, Grouped Data Exponentially Weighted Moving Average Control Charts, Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 47, No. 2 (1998), pp. 203-216 ...

We study families of two-sample tests with grouped or multinomial data. The tests are based on models for which some function of hazard or continuation ratio probabilities in two distributions differ ...