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Statistics

Percentages, fractions, geometry, algebra, and number theory.

13 calculators in Statistics

Calculate mean, median, mode, and range of numbers.

Calculate the confidence interval for a population mean using sample data.

Calculate Pearson's r correlation coefficient and R² from paired (x, y) data.

Calculate the Gini coefficient to measure income or wealth inequality in a distribution.

Calculate the best-fit line y = mx + b from data pairs. Get slope, y-intercept, R², and Pearson r.

Calculate the odds ratio from a 2×2 contingency table with 95% confidence interval and relative risk.

Calculate the p-value from a z-score or t-statistic for one-tailed and two-tailed hypothesis tests.

Calculate average wait times and queue lengths using M/M/1 and M/M/c queuing theory formulas.

Calculate standard deviation and variance of a data set.

Calculate the standard error of the mean and confidence interval margins from sample standard deviation and sample size.

Calculate the required sample size or achieved statistical power for one-sample, two-sample, and paired tests using Cohen's d effect size.

Calculate weighted mean from values and their weights.

Calculate the Z-score (standard score) of a value within a dataset using mean and standard deviation.