Syntax - Stata
test the null hypothesis that X 1 ˘X 2. We have a sample of size n 1 from X 1 and another of size n 2 from X 2. The data are then ranked without regard to the sample to which they belong. If the data are tied, averaged ranks are used. Wilcoxon’s test statistic (1945) is the sum of the ranks for the observations in the first sample: T = Xn 1 ...
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Syntax - Stata
www.stata.com2cluster kmeans and kmedians— Kmeans and kmedians cluster analysis Options Main k(#) is required and indicates that # groups are to be formed by the cluster analysis.
Syntax Description - Stata
www.stata.com2substr()— Extract substring Diagnostics In substr(s, b, l) and substr(s, b), if b describes a position before the beginning of the string or after the end, "" is returned.
Title stata.com generate — Create or change …
www.stata.comTitle stata.com generate — Create or change contents of variable SyntaxMenuDescriptionOptions Remarks and examplesMethods and formulasReferencesAlso see Syntax Create new variable generate type newvar
SyntaxDescriptionRemarks and examplesAlso see
www.stata.commacro— Macro definition and manipulation 3 Macro extended functions related to matrices rownamesjcolnamesjrowfullnamesjcolfullnames matname roweqjcoleq
Title stata.com graph box — Box plots
www.stata.comgraph box— Box plots 3 Menu Graphics > Box plot Syntax graph box yvars if in weight, options graph hbox yvars if in weight, options where yvars is a varlist options Description
Title stata
www.stata.comarea options — Options for specifying the look of special areas 3 Also see [G-2] graph dot — Dot charts (summary statistics)
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www.stata.com2cluster dendrogram— Dendrograms for hierarchical cluster analysis The height of the vertical lines and the range of the (dis)similarity axis give visual clues about the
Title stata.com putexcel — Export results to an Excel …
www.stata.computexcel— Export results to an Excel file 3 export options Description Main overwritefmt overwrite existing cell formatting when exporting new content
destring — Convert string variables to numeric ... - …
www.stata.comTitle stata.com destring — Convert string variables to numeric variables and vice versa SyntaxMenuDescription Options for destringOptions for tostringRemarks and …
Title stata.com gettoken — Low-level parsing
www.stata.comTitle stata.com gettoken — Low-level parsing SyntaxDescriptionOptionsRemarks and examplesAlso see Syntax gettoken emname1 emname2: emname3, parse("pchars") quotes qed(lmacname) match(lmacname) bind
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onlinepubs.trb.orgTable C-8 (Continued) Quantiles of the Wilcoxon Signed Ranks Test Statistic For n larger t han 50, the pth quantile w p of the Wilcoxon signed ranked test statistic may be approximated by (1) ( 1)(21) pp424 nnnnn wx +++ == , wherex p is the p th quantile of a standard normal random variable, obtained from Table C-1.
Mann-Whitney U test (Non-parametric equivalent to ...
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www.unilim.frtest de Kruskal et Wallis ci-dessous le nombre h tel que, sous ( H 0), P(H h ) = . On rejette ( H 0) au risque d'erreur si h h . Autrement on accepte ( H 0). 3 estT de Wilcoxon On dispose de deux échantillons appariés E 1 et E 2, c'est-à-dire que chaque aleurv de E 1 est associée à une aleurv de E 2. On teste l'hypothèse nulle ( H 0) : 1 ...