Statistics Calculators

Hypergeometric Distribution Calculator

Calculate hypergeometric distribution probabilities and statistics with step-by-step derivation

Exponential Distribution Calculator

Calculate exponential distribution PDF, CDF, survival function, and statistics with step-by-step derivation

Uniform Distribution Calculator

Calculate uniform distribution PDF, CDF, probability intervals, and statistics with step-by-step derivation

Histogram Frequency Calculator

Bin data and calculate frequencies, cumulative frequencies, and relative frequencies with step-by-step derivation

Descriptive Statistics Calculator

Calculate mean, median, mode, variance, standard deviation, quartiles, and more with step-by-step derivation

Binomial Probability Calculator

Calculate P(X=k) for binomial distribution with step-by-step derivation

Box Plot Generator

Create box and whisker plots with quartiles and outliers with step-by-step derivation

Combination Calculator

Calculate combinations C(n,k) with step-by-step derivation for probability and statistics

Factorial Calculator

Calculate n! factorial with step-by-step derivation for permutations and combinations

Geometric Mean Calculator

Calculate geometric mean for positive numbers with step-by-step derivation

Harmonic Mean Calculator

Calculate harmonic mean for positive numbers with step-by-step derivation

Interquartile Range Calculator

Calculate IQR, quartiles Q1, Q2, Q3 with step-by-step derivation

Mean Median Mode Calculator

Calculate arithmetic mean, median, mode, range with step-by-step derivation

Midrange Calculator

Calculate midrange as average of max and min with step-by-step derivation

Normal Distribution Calculator

Calculate probabilities, z-scores, and percentiles for normal distribution with step-by-step derivation

Outlier Detector Calculator

Identify outliers using IQR method and Z-score method with step-by-step derivation

Permutation Calculator

Calculate permutations P(n,k) with step-by-step derivation for probability and statistics

Poisson Probability Calculator

Calculate P(X=k) for Poisson distribution with step-by-step derivation

Population Standard Deviation Calculator

Calculate population standard deviation (σ) with step-by-step derivation

Population Variance Calculator

Calculate population variance (σ²) with step-by-step derivation

Quartile Calculator

Calculate quartiles Q1, Q2, Q3 and interquartile range with step-by-step derivation

Range Variance Standard Deviation Calculator

Calculate range, variance, standard deviation for population and sample with step-by-step derivation

Sample Standard Deviation Calculator

Calculate sample standard deviation (s) using Bessel's correction with step-by-step derivation

Sample Variance Calculator

Calculate sample variance (s²) using Bessel's correction with step-by-step derivation

Weighted Mean Calculator

Calculate weighted average with custom weights with step-by-step derivation

Variance & Standard Deviation Calculator

Compute variance, standard deviation, mean, and other statistical measures

Median & Mode Calculator

Calculate median, mode, range, and other descriptive statistics

Permutation & Combination Calculator

Compute P(n,k) permutations and C(n,k) combinations with detailed steps

Normal Distribution Calculator

Compute normal distribution PDF and CDF values

Sampling Error Calculator

Calculate sampling error, standard error, and margin of error

Confidence Interval Calculator

Compute confidence intervals for population means

Z Score Calculator

Calculate z-score (standard score) and understand how many standard deviations from the mean

T Score Calculator

Calculate t-statistic for hypothesis testing with step-by-step derivation

P Value Calculator

Calculate p-value for z-tests and t-tests to determine statistical significance

Margin of Error Calculator

Calculate margin of error for surveys and confidence intervals

Correlation Coefficient Calculator

Calculate Pearson correlation coefficient r between two variables

Linear Regression Calculator

Find the line of best fit with slope, intercept, and regression equation

Slope Intercept Form Calculator

Calculate equation of a line in y = mx + b form from two points

Covariance Calculator

Calculate population and sample covariance between two variables

Chi Square Calculator

Calculate chi-square statistic for goodness of fit and independence tests

ANOVA Calculator

One-way analysis of variance to compare means of multiple groups

Standard Error Calculator

Calculate standard error of the mean from raw data or summary statistics

Relative Frequency Calculator

Calculate relative frequencies and percentages for data

Cumulative Frequency Calculator

Calculate cumulative frequencies and cumulative percentages for data

Mode Grouped Data Calculator

Calculate mode for grouped data using modal class and interpolation

Median Grouped Data Calculator

Calculate median for grouped data using interpolation

Skewness Calculator

Calculate skewness using Pearson mode, median, and sample methods

Kurtosis Calculator

Calculate kurtosis and excess kurtosis for distribution tails

Percentile Calculator

Calculate percentiles using linear interpolation and nearest rank methods

Rank Calculator

Calculate ranks using competition, dense, and fractional methods

Sample Size Calculator

Calculate required sample size for confidence intervals and hypothesis testing

Effect Size Calculator

Calculate Cohen's d, Hedges' g and other effect size measures

Probability Fraction Calculator

Convert between decimals, fractions, percentages, and odds for probabilities

Odds Ratio Calculator

Calculate odds ratio and confidence interval from 2x2 contingency table

Risk Ratio Calculator

Calculate risk ratio (relative risk) and confidence interval from 2x2 table