Easily calculate the pooled standard deviation for two independent samples. This essential statistical tool helps estimate the combined variability when comparing means, crucial for t-tests and ANOVA. Get accurate results for your research, studies, and data analysis quickly and efficiently with our user-friendly online calculator.
Formula:
The formula to calculate the pooled standard deviation (sp) for two samples is:
sp = √ ((n1 - 1)s12 + (n2 - 1)s22) / (n1 + n2 - 2)
Where:
- sp = Pooled Standard Deviation
- n1 = Sample size of Group 1
- s1 = Standard deviation of Group 1
- n2 = Sample size of Group 2
- s2 = Standard deviation of Group 2