Variance Calculator
Easily calculate variance from a data set to measure the spread or dispersion.
Result:
- Variance (S²):
- Standard Deviation (S):
- Sum of Squares (SS):
- Mean:
- Count (n):
Step-by-step Explanation:
Frequently Asked Questions
Variance tells you how far numbers are from the mean. A low variance means values are close together, while a high variance means more spread.
Variance helps identify consistency, risk, and reliability in data. It is widely used in statistics, finance, research and quality control.
A Variance Calculator measures how much data values spread away from the average. It shows whether the data is tightly grouped or widely scattered.
Use a Sample variance Calculator when your data represents only a part of a larger group. It gives a more accurate estimate by adjusting for sample size.
A Population variance calcualtor is used when you have data for the entire group. No estimation is needed because every value is included.
Sample variance divides by (n − 1) to reduce bias, while population variance divides by n. The choice depends on whether your data is complete or partial.