Compute Standard Deviation from a frequency table
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X P(X=x)
(5 @ .12)
(6 @ .24)
(8 @ .44)
(10 @ .20)
What is the standard deviation of X?
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Solution Summary
A step-by-step solution shows the student how to calculate the standard deviation given a probability distribution.
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So, standard deviation is computed as follows...
sqrt[E(x^2)-(Ex)^2]
So to find E(x) (the mean) we ...
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