Analysis of Asset Allocation

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Descriptive statistics - Variance and Standard Deviation
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The variance of a sample measures how the observations are spread around the mean. Large variance means the date is widely spread around the mean.

The formula is:

The unbiased formula is (for a sample):


x = the mean.

N = the population size.

n = the sample size.

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The standard deviation is the the square root of the variance. The standard deviation is in the same 'scale' as the mean is. The makes these two indicators 'comparable'.

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