High Quality Content by WIKIPEDIA articles! XLfit is a Microsoft Excel-based plug-in which allows curve fitting and statistical analysis. XLfit generates 2D and 3D graphs and analyses data sets produced by any type of research. XLfit's curve fitting engine allows linear and non-linear curve fits, smoothing, statistics, weighting and error bars. Available statistics models include Spearman's Rank Correlations,Student's T-Test, Mann Whitney U-Test, Sum of Squares, ANOVA, among others. Microsoft Excel is a spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. It features calculation, graphing tools, pivot tables and a macro programming language called VBA.

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