If you scored higher than the 3rd quartile (Q3) then you made __________________________
above 75% of the scores
the mean and median will have the same value only in distributions that are ________________-
symmetrical
central purpose of descriptive statistics is to __________________ data
summarize or reduce
IQR:
the distance from the third to 1st quartile; a kind of range that acoids some of the problems associated with range outliers by considering only the middle 50% of the cases in distribution
the greater the value of a range the greater the _______________ in the distribution
dispersion
what does least square principle say?
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
range:
distance between highest and lowest scores in distribution (high score-low score)
median can be found for _______________ data, but generally it more appropriate for ______________ data.
interval ratio; ordinal
if mean < median, what would you expect your distribution curve to look like?
skewed to the left (- skew)
limitations to range
range might exaggerate the amount of dispersion for most of scores in distribution
