A method of allowing or `adjusting` the effects of other variables, or for differences in the composition of the groups that are to be compared, by using a standard set of weights to combine the means of sub-groups into a single mean. Used mainly for the construction of index numbers......
The probability distribution of a pair of standardized normal variates. For a pair of normal variates (X, Y ) of parameters (mx , my) and (sx and sy) the corresponding standardized variates are .....