When and why do you use each of the following: sums of squares, variance, standard deviation and range?
When and why do you use Each one?
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October 18th, 2010 at 6:33 am
All are used in statistics. Standard deviation is used in the 68-95-99.7 percentiles and correlates to Z-Scores. Range is the range of the data set. Sums of squares is used to find the least squares regression line (line of best fit, y-hat = a + bx) and variance is the discrepancy.