Accurately calculate the pooled variance for two independent samples. This tool helps you estimate the common population variance, crucial for t-tests and hypothesis testing in statistics. Simply input your sample sizes and variances.
Formula:
The formula for pooled variance (sp2) is:
sp2 = [ (n1 - 1)s12 + (n2 - 1)s22 ] / [ (n1 - 1) + (n2 - 1) ]
Where:
- sp2: Pooled variance
- n1: Sample size of Group 1
- s12: Variance of Group 1
- n2: Sample size of Group 2
- s22: Variance of Group 2