School and statistics

Means, deviations, probability and other statistical calculations for school.

All tools

Computes the arithmetic mean of a list of numbers: sum / count.

Calculates weighted mean: sum(value × weight) / sum(weights).

Finds the middle value of a sorted list of numbers.

Finds the most frequently occurring value in a dataset.

Calculates standard deviation as the square root of data variance.

Computes variance as the mean of squared deviations from the mean.

Calculates event probability as favorable outcomes divided by all outcomes.