median
don steward
mathematics teaching 10 ~ 16

Thursday 21 January 2016

mean of the means

finding the mean of the means for different sizes of subgroups is a way of practising this skill, subsumed within a larger task of establishing when the mean of the means is equal to the mean of the (parent) set

this happens evidently when the subsets are the same size

but... there are other cases when they are the same...







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