Statistics

Enter your numbers to find the median instantly. Works for odd/even lists and shows sorting + result clearly.

Calculate mean, median, and mode in one click. Supports multiple modes and shows a clean breakdown.

Run a chi-square (χ²) test in seconds. Compute χ² statistic, degrees of freedom, p-value, and conclusion for independence or goodness of fit.

Free z-test calculator for hypothesis testing. Enter sample data, alpha, and tail type to get z score, p-value, and critical value instantly.

Calculate z-scores (standard scores) from a value, mean, and standard deviation. Optionally convert z to percentile and probability instantly.

Free online confidence interval calculator for mean and proportion. Enter sample data to get SE, margin of error and 95% or custom CI in seconds.

Free p-value calculator for z, t, χ², F and correlation. One-/two-tailed tests, α significance check, critical value & interpretation. Instant results with steps & PDF.