kurtosis- not normal distribution
measures of central tendency: mean, median, mode
mean- average
median- middle score
mode- most frequently occuring score
- mean, median, mode all are same place on a bell shaped curve
variants- units on the bell shaped curve
68% of scores within one SD (standard deviations) on the curve
97% of scores are within 2 SD on the curve
99% of scores within 3 SD
variants- big picture
statistical regression- on a reliable curve we regress to the mean.
standard deviations- one piece
Pie example- variants is the pie, SD is a slice
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