Statistics
Calculate descriptive quantities from stated inputs and statistical assumptions.
Z-Score Calculator
Standardize a supplied observation using an explicit mean and standard deviation.
Open toolStandard Error of the Mean Calculator
Calculate the standard error of a sample mean from sample standard deviation and sample size.
Open toolCoefficient Of Variation Calculator
Compare sample standard deviation with the positive mean as a percentage.
Open toolObserved Proportion Calculator
Calculate the observed proportion and percentage from successes and sample count.
Open toolMean Median Mode Calculator
Find the average, middle value and most frequently repeated values in a list of numbers.
Open toolVariance Calculator
Calculate sample or population variance from a list of numbers and compare their spread.
Open toolStandard Deviation Calculator
Calculate sample or population standard deviation from a list of observations.
Open toolQuartile Calculator
Find the first quartile, median and third quartile using linear percentile interpolation.
Open toolPercentile Calculator
Find the value at a chosen percentile of a list using linear interpolation.
Open toolInterquartile Range Calculator
Calculate the distance between the first and third quartiles of your data.
Open toolFive Number Summary Calculator
Summarize a list with its minimum, first quartile, median, third quartile and maximum.
Open toolOutlier Calculator
Identify values outside the 1.5 IQR Tukey fences using the stated quartile convention.
Open toolLinear Regression Calculator
Fit a least-squares straight line to paired observations and find its slope and intercept.
Open toolPearson Correlation Calculator
Measure the linear association between two equally sized lists of observations.
Open toolSpearman Correlation Calculator
Calculate rank correlation between paired observations, assigning average ranks to ties.
Open toolR Squared Calculator
Calculate R squared from actual values and predictions, including negative results where appropriate.
Open toolGeometric Mean Calculator
Find the geometric mean of positive numbers using their logarithms.
Open toolHarmonic Mean Calculator
Find the harmonic mean of positive numbers, useful when comparing suitable rates.
Open toolRoot Mean Square Calculator
Calculate the RMS magnitude of a list, including positive and negative values.
Open toolMedian Absolute Deviation Calculator
Find the unscaled median absolute deviation as a robust measure of spread.
Open toolMean Absolute Deviation Calculator
Find the average absolute distance of observations from their arithmetic mean.
Open toolRange Calculator
Find the spread between the largest and smallest values in a list.
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