Measures of Variation. Sample range Sample variance Sample standard deviation Sample interquartile range. Sample Range. or, equivalently. R = largest obs. - smallest obs. R = x max - x min. Sample Variance. Sample Standard Deviation. What is a standard deviation?.
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R = largest obs. - smallest obs.
R = xmax - xmin
IQR = third quartile - first quartile
IQR = Q3 - Q1
Min = 3.20
Max = 124.27
Q2 = 60.345
Q1 = 43.645
Q3 = 84.96
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