Mean, Median, Mode, Range Calculator

How it works

Mean = sum / count. Median = middle value (sorted). Mode = most frequent (may be none or multiple). Range = max − min. Variance = average squared deviation from mean. Standard deviation = √variance. Population vs. sample SD: divide by N or N−1 respectively. Outliers inflate mean and SD but leave median relatively unaffected—use median for skewed distributions like incomes.