WEIGHTED SUM OF DEVIATIONS FROM THE MEANName:
where X is the response variable, W is the weights variable, and is the sample mean. The response variable and weights variable must have the same number of observations.
For this command, the weights are not normalized. However, at least one of the weights must be positive and none of the weights can be negative. Otherwise, an error message is reported.
where <x> is the response variable;
<w> is the weights variable;
<par> is a parameter where the weighted sum of deviations from the mean is saved;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.
LET A = WEIGHTED SUM OF DEVIATIONS FROM THE MEAN Y1 WEIGHT SUBSET Y1 > 0
LET Y = DATA 2 3 5 7 11 13 17 19 23 LET W = DATA 1 1 0 0 4 1 2 1 0 . LET A = WEIGHTED SUM OF DEVIATIONS FROM THE MEAN Y WThe returned value is 3.8889.
Date created: 06/29/2012