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8 Cards in this Set

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  • Back
SAMPLING DISTRIBUTION OF DIFFERENCES BETWEEN MEANS
THE DISTRIBUTION OF THE DIFFERENCES BETWEEN MEANS OVER REPEATED SAMPLING FROM THE SAME POPULATIONS
VARIANCE SUM LAW
THE RULE GIVING THE VARIANCE OF THE SUM (OR DIFFERENCE) OF TWO OR MORE VARIABLES
STANDARD ERROR OF DIFFERENCES BETWEEN MEANS
THE STANDARD DEVIATION OF THE SAMPLING DISTRIBUTION OF THE DIFFERENCES BETWEEN MEANS
HOMOGENEITY OF VARIANCE
THE SITUATION IN WHICH TWO OR MORE POPULATIONS HAVE EQUAL VARIANCES
WEIGHTED AVERAGE
THE MEAN OF THE FORM (a1x1 + a2x2)/(a1 + a2), WHERE a1 AND a2 ARE WEIGHTING FACTORS AND x1 AND x2 ARE THE VALUES TO BE AVERAGED
POOLED VARIANCE
A WEIGHTED AVERAGE OF THE SEPARATE SAMPLE VARIANCES
CONFOUNDED
TWO VARIABLES ARE SAID TO BE CONFOUNDED WHEN THEY ARE VARIED SIMULTANEOUSLY AND THEIR EFFECTS CANNOT BE SEPERATED
HETEROGENEITY OF VARIANCE
A SITUATION IN WHICH SAMPLES ARE DRAWN FROM POPULATIONS HAVING DIFFERENT VARIANCES