- CI & Hypothesis Test Wizard (Means & Proportions) | CalcBE
Build confidence intervals and hypothesis tests for means and proportions. Supports Welch, paired, Wilson, Newcombe, and visualises p-values.
- Linear Regression & Correlation — Scatter, OLS/WLS, R² (with steps) | CalcBE
Paste x,y[,w] data or upload a CSV to fit OLS, WLS or Theil–Sen regression. See the fitted line, 95% bands, residual plots and key tests on one interactive chart.
- Error propagation calculator – sums, products & powers | CalcBE
Propagate uncertainty for sums, products, powers and general functions using gradient×covariance steps, correlation options and Monte Carlo checks, with templates for common lab calculations.
- Deviation Score (T-score) & Percentile Calculator | CalcBE
Calculate z-score, deviation score (T-score / hensachi), and percentile. Supports input from mean & standard deviation, or from a score list / frequency table.
- Normal Distribution Calculator (z-score, CDF, percentile) | CalcBE
Calculate normal distribution probabilities, z-scores, and percentiles from mean and standard deviation. Includes PDF/CDF, interval probability, inverse CDF, steps, and a shaded curve.