How to use it
Use this calculator for descriptive exploration of finite numeric observations, not inferential conclusions.
- Enter numbers separated by whitespace, semicolons, or the delimiter shown for this locale.
- Calculate to validate every token and sort a copy only for the median.
- Review centre, spread, and the separate population and sample measures.
Worked example
- Input
2, 4, 4, 4, 5, 5, 7, 9
- Output
Mean 5 · population variance 4 · population standard deviation 2
Sample variance divides by n−1 and is unavailable for a single observation.
Method and definitions
- Welford accumulation reduces cancellation error in mean and variance; median uses a numeric sorted copy.
- Population variance divides the squared-deviation sum by n; sample variance divides by n−1.
Limits and edge cases
- No weighting, missing-value repair, confidence interval, distribution test, or outlier judgement is performed.
- The input is limited to 100,000 finite values; locale-aware decimal and list separators are stated beside the field.
Privacy
All input and output stays in this tab. Rigula does not upload, store, or include it in a share URL.
Sources
