Pooled Standard Deviation
This is a weighted average of standard deviations of two or more groups which are independent.
In statistics, it is used to test whether or not the means of two populations are equal.
Mathematically, it is defined as
Pooled standard deviation =
[Tex]\sqrt{(n_1-1)s_1^2 + (n_2-1)s_2^2 / (n_1+n_2-2)}[/Tex]
where:
- n1, n2: Sample size for both groups
- s1, s2: Standard deviation for both groups
How to Calculate Pooled Standard Deviation in R
In this article, we will learn How to Calculate Pooled Standard Deviation in R.
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