Stdv Equation. Standard deviation is the square root of variance but variance is given by mean so divide by number of samples. 9 2 4 5 7 3 6 5.
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But standard deviation equals the square root of variance so sd the square root of 3 85 which is 1 96. The standard deviation is a measure of how spread out numbers are. It is the square root of the variance.
Then for each number.
Using sampled values 9 2 5 4 12 7. 9 5 2 16. Standard deviation may be abbreviated sd and is most commonly. Where x is the sample mean average number1 number2 and n is the sample size.
