How do you compute the above with a set of data. I need some basic help related to syntax used. I also want to know is there any better way to work on the same on a large database.
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How do you compute the above with a set of data. I need some basic help related to syntax used. I also want to know is there any better way to work on the same on a large database.
Member
Try this out : % of values within mean +- k => 1-1/k^2 where k=standard deviation and 75% = 1-1/4 (k=2).
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The Chebyshev inequality , it follows that the random variable is removed from its expectation by more than k standard deviations of the probability of less than 1 / k ². For example, at least 75% of the random variable is removed from the average by no more than two standard deviations, and in about 89% - no more than three.
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