Statistical Inference

Inference

Estimate population parameters, test hypotheses, assess distributional assumptions, and run rank-based procedures using pasted raw data or summary statistics.

Confidence Interval for One Variance

Estimate a population variance using the chi-square distribution.

Interactive inference

Input mode

Raw data Summary statistics

Data

Paste raw numeric observations. At least two non-constant observations are required.

Sample summary

Sample size (n)

Sample variance (s²)

Confidence level (%)

Enter the confidence level as a percentage. Example: 95 means 95% confidence and implies α = 0.05.

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Ready to calculate

Choose the input mode, paste data or enter summary statistics, then press Calculate.