How to Use
- Enter your numerical data values separated by commas, spaces, or new lines
- Select whether your data represents a population or sample
- Click "Calculate" to see variance and standard deviation
Understanding Variance & Standard Deviation
Variance measures how far data points are spread from the mean. It's calculated by averaging the squared differences from the mean.
Standard Deviation is the square root of variance and is in the same units as your data, making it easier to interpret.
- Population: Use when you have data for the entire group (divide by n)
- Sample: Use when you have data from a subset (divide by n-1)
- Lower values indicate data points are close to the mean
- Higher values indicate data points are spread out over a wider range