Math & Science
Variance Calculator
🔒 ブラウザで動作
Calculate population and sample variance, standard deviation, mean, min, max, and range from a list of numbers. Free, instant, no signup.
このツールの使い方
- Paste the list of numbers you want to analyse.
- Both population and sample variance are computed at once.
- Read variance, standard deviation, mean, min, max, and range.
よくある質問
- What is variance?
- The average of the squared deviations from the mean. It measures how spread out the data is; its square root is the standard deviation.
- How do population and sample variance differ?
- Population variance divides the sum of squared deviations by n; sample variance divides by n − 1. The tool shows both so you can pick the right one for your data.
- Why are both reported?
- Because the correct choice depends on whether your numbers are the entire population or a sample of it — showing both avoids guessing wrong.
- Is the list I enter transmitted?
- No. Both variance figures are computed in your browser; your numbers never leave the page.