mean is pt around which variation of score is minimized; if difference b/t scores and mean are squared and then added, the resultant sum will be less than the sum of the squared differences b/t the scores and any other point in the distribution
when mean > median, what would you expect your distribution curve to look like?
skewed to the right (+ skew)
measure of dispersion can reveal substantial differences between distributions even when _____________________ are the same
measures of central tendency
formula for mean (x bar)=
the sum of (xi) / N
the mode is the most ___________________ and is used most appropriately with _____________________variables
common value; nominal-level
If you scored higher than the 3rd quartile (Q3) then you made __________________________
above 75% of the scores
_____________ describe the variety, diversity, or heterogeneity of a distribution of scores; describes the variability of data (variants.)
measures of dispersion
the sum of squared deviations will _______________ with sample size
increase
D1 or the first decile is the point below which ______________ of the cases fall
10%
horizontal line in the middle of the IQR box represents :
