Statistics
Mean, median, percentile, probability and regression calculators.
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Mean, Median, Mode Calculator
Find the mean, median and mode of a data set.
Range Calculator
Find the range of a data set.
Sample Variance Calculator
Calculate the sample variance of data.
Relative Standard Deviation Calculator
Calculate the coefficient of variation (RSD).
Covariance Calculator
Calculate the covariance of paired data.
Correlation Coefficient Calculator
Calculate the Pearson correlation coefficient.
Linear Regression Calculator
Find the best-fit line for paired data.
Mean Absolute Deviation Calculator
Calculate the mean absolute deviation.
Root Mean Square (RMS) Calculator
Calculate the root mean square of values.
Midrange Calculator
Calculate the midrange of a data set.
T-Score Calculator
Calculate a one-sample t-score.
Skewness Calculator
Calculate the skewness of a data set.
Kurtosis Calculator
Calculate the excess kurtosis of a data set.
Pooled Standard Deviation Calculator
Combine the standard deviations of two samples.
Mean of Grouped Data Calculator
Calculate the mean from class midpoints and frequencies.
Cumulative Frequency Calculator
Build a cumulative frequency table.
Probability of A or B Calculator
Calculate the probability of either event occurring.
Binomial Coefficient Calculator
Calculate n choose k (combinations).
Permutations Calculator
Calculate n permute r (nPr).
Poisson Probability Calculator
Calculate a Poisson probability.
Normal Distribution Calculator
Find the z-score and probabilities for a value.
Empirical Rule Calculator
Apply the 68-95-99.7 rule to a distribution.
Chebyshev’s Theorem Calculator
Find the minimum proportion within k standard deviations.
Point Estimate Calculator
Estimate a population proportion from a sample.
Trimmed Mean Calculator
Calculate a trimmed mean by removing extremes.
P-Value from Z-Score Calculator
Find the p-value for a z-score.
Geometric Distribution Calculator
Find the probability of the first success on trial k.
Hypergeometric Distribution Calculator
Calculate hypergeometric probability (sampling without replacement).
Exponential Distribution Calculator
Calculate exponential distribution probabilities.
Uniform Distribution Calculator
Calculate uniform distribution statistics.
Bayes’ Theorem Calculator
Calculate a posterior probability with Bayes’ theorem.
Conditional Probability Calculator
Calculate P(A|B) from joint and marginal probabilities.
Odds Ratio Calculator
Calculate the odds ratio from a 2×2 table.
Relative Risk Calculator
Calculate relative risk from a 2×2 table.
Percentile Calculator
Find the value at a percentile in a data set.
Quartile Calculator
Find the quartiles of a data set.
Interquartile Range (IQR) Calculator
Calculate the interquartile range of data.
Five Number Summary Calculator
Find the min, quartiles, median and max of data.
Confidence Interval Calculator
Calculate a confidence interval for a mean.
Standard Error Calculator
Calculate the standard error of the mean.
Sample Size Calculator
Find the sample size for a survey.
Margin of Error Calculator
Calculate a survey’s margin of error.
Probability Calculator
Calculate the probability of an event.
Odds to Probability Calculator
Convert odds to a probability.
Probability to Odds Calculator
Convert a probability to odds.
Expected Value Calculator
Calculate the expected value of two outcomes.
Relative Frequency Calculator
Calculate the relative frequency of a value.
Z-Score to Percentile Calculator
Convert a z-score to a percentile.