Standard Deviation Formula

Sample Standard Deviation
$The Sample Standard Deviation Formaula is s= \frac{\sqrt{\sum{x-\bar{x}}^2}}{n-1}$

Population Standard Deviation
$The population standard deviation formula is s= \sqrt{\frac{n(\sum{x}^2)-(\sum{x})^2}{n(n-1)}}$

Frequency Table : Standard Deviation
$Frequency Table Standard Deviation is s= \sqrt{\frac{n[\sum(f \cdot {x}^2)]-[\sum(f \cdot x)]^2}{n(n-1)}}$

Last Modified on September 7, 2013 by JoeStat

Speak Your Mind Cancel reply