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:: Free Statistics Software (Calculator) - Web-enabled scientific services & applications ::
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The non-commercial (academic) use of this software is free of charge. The only thing that is asked in return is to cite this software when results are used in publications.
Here you find a collection of Free Descriptive Statistics Software modules (Calculators). The modules have been grouped in Univariate, Bivariate, and Trivariate categories. All modules can be used with any dataset that contains ungrouped observations.| Main Menu | return to Main Menu
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| | | | Univariate Descriptive Statistics - Ungrouped Data | | | | Central Tendency | arithmetic mean, geometric mean, harmonic mean, median, midrange, midmean, robustness of central tendency (winsorized and trimmed mean), etc...
| | | | Variability | range, variance, standard deviation, variation, MSE, absolute deviation, interquartile difference, coefficient of quartile variation, Gini's mean difference, Leik's D, dispersion, diversity, qualitative variation, mean square deviation, etc...
| | | | Concentration | entropy, exponential index, Herfindahl, variation coefficient, Gini coefficient, Lorenz curve, etc...
| | | | Moments | general, non centered & centered moments, trimmed moments
| | | | Skewness/Kurtosis | Fisher 3rd centered moment, Fisher beta 1 & gamma 1, Pearson, Yule's skewness (according to 8 different quartile definitions), Beta, Gamma, small sample skewness, Fisher 4th centered moment, Fisher beta 2 & gamma 2, small sample kurtosis, etc...
| | | | Quartiles | weighted average, empirical distribution, closest observation, TrueBasic(TM), Excel(TM), etc...
| | | | Percentiles | normal probability plot, weighted average, empirical distribution, closest observation, TrueBasic(TM), Excel(TM), etc...
| | | | Histogram | mean, standard deviation, range, interval size, goodness of fit, etc...
| | | | Kernel Density Estimation | computes and plots the density trace of a data series for different Kernels: Gaussian, Epanechnikov, Rectangular, Triangular, Biweight, Cosine, and Optcosine
| | | | Harrell-Davis Quantiles | computes the Harrell-Davis Quantiles and associated standard errors.
| | | | Stem-and-leaf | Computes the Stem-and-leaf plot of a dataseries
| | | | Univariate EDA | computes a series of graphical tools for the purpose of Explorative Data Analysis
| | | | Bootstrap Plot - Central Tendency | computes the Bootstrap Plot for three measures of Central Tendency
| | | | Blocked Bootstrap Plot - Central Tendency | computes the Blocked Bootstrap Plot for three measures of Central Tendency (for stationary time series)
| | | | Mean Plot | computes the Mean Plot for a (time) series
| | | | Standard Deviation Plot | computes the Standard Deviation Plot for a (time) series
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| | Bivariate Descriptive Statistics - Ungrouped Data | | | | Correlation | Pearson correlation, covariance, determination coefficient, scatter plot, etc...
| | | | Rank Correlation | Spearman Rank Order Correlation (corrected and non-corrected).
| | | | Simple Regression | general linear model, mean and variances, covariance, correlation, least squares estimation, parameters, response, significance, determination coefficient, ANOVA, residuals, autocorrelation, model selection, model performance, etc...
| | | | Bivariate Density | computes Bivariate Kernel Density Estimates
| | | | Kendall Rank Correlation | computes the Kendall tau Rank Correlation between two data series
| | | | Box-Cox Linearity Plot | computes the Box-Cox Linearity Plot
| | | | Linear Regression Graphical Model Validation | computes the Simple Linear Regression model (Y = a + b X) and various diagnostic tools from the perspective of Explorative Data Analysis
| | | | Back to Back Histogram | computes the Back to Back Histogram (sometimes called Bihistogram) for a bivariate dataset
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| | Trivariate Descriptive Statistics - Ungrouped Data | | | | Partial Correlation | Pearson Product Moment Partial Correlation.
| | | | Trivariate Scatterplots | computes 3-dimensional scatterplots, combinations of 2-by-2 scatterplots, histograms, bivariate density plots
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| | Multivariate Descriptive Statistics - Ungrouped Data | | | | Kendall tau Correlation Matrix | computes the (multivariate) correlation plot based on Kendall tau rank correlations
| | | | Notched Boxplots | computes notched boxplots for every variable of the multivariate dataset
| | | | Star Plot | computes the Star Plot for a multivariate dataset
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To cite Wessa.net in publications use:
Wessa, P. (2008), Free Statistics Software, Office for Research Development and Education,
version 1.1.20, URL http://www.wessa.net/
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Software Version : 1.1.20
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