Mean Variance Standard Deviation
Mean Variance Standard Deviation Assignment Help | Mean Variance Standard Deviation Homework Help
Mean, Variance, Standard Deviation Assignment Homework help
Mean Absolute Deviation
The mean absolute deviation (MAD) is the average of absolute values of deviations around the mean for a set of numbersMAD = Σl x - μ l
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Variance
Because absolute values are not conducive to easy manipulations, mathematicians developed an alternative mechanism for over coming the zero-sum property of deviations from the mean. The result is variance, an important measure of variability.The variance is the average of the squared deviations about the arithmetic mean for a set of numbers. The population variance is denoted by
σ2 = Σ (x - μ)2
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Standard Deviation
The standard deviation is a popular measure of variability. It is used both a s separate entity and as a part of other analyses, such as computing confidence intervals and in hypothesis testing.σ = √Σ (x - μ)2
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