Calculate variance and standard deviation for population or sample data instantly.
Enter your data set, choose population or sample calculation, and click Calculate. Use "Population" when your data is the entire group; use "Sample" when your data is a subset used to estimate a larger group.
Variance = ฮฃ(x โ mean)ยฒ รท n (or nโ1 for sample)
Standard Deviation = โVariance