Properties of variance and standard deviation ch 4 lec 7

Properties of variance and standard deviation
Semi interquartile range and quartile deviation. Variance for grouped and ungrouped data.
Range is a simplest measure of dispersion. Range is a difference between largest and smallest value. Range for grouped and ungrouped data are describe.
Measures of dispersion, skewness and kurtosis also introduce in this chapter. Most common measures of dispersion range, semi interquartile range, mean deviation and standard deviation also discuss in video. Measures of dispersion meaning how much values disperse from their averages.
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