nptrend.hlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

{smcl}
{* 17dec2004}{...}
{cmd:help nptrend}{right:dialog:  {bf:{dialog nptrend}}}
{hline}

{title:Title}

{p2colset 5 20 22 2}{...}
{p2col :{hi:[R] nptrend} {hline 2}}Test for trend across ordered groups{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 16 2}
{cmd:nptrend} {varname} {ifin} {cmd:,} {opt by(groupvar)}
[{opt nod:etail} {opt s:core(scorevar)}]


{title:Description}

{pstd}
{opt nptrend} performs the nonparametric test for trend across ordered groups
developed by Cuzick, which is an extension of the Wilcoxon rank-sum test
({helpb ranksum}).  A correction for ties is incorporated into the test.
{opt nptrend} is a useful adjunct to the Kruskal-Wallis test; see
{helpb kwallis}.


{title:Options}

{dlgtab:Main}

{phang}
{opt by(groupvar)} is required; it specifies the group on which the data is to
be ordered.

{phang}
{opt nodetail} suppresses the listing of group rank sums. 

{phang}
{opt score(scorevar)} defines scores for groups.  When it is not specified,
the values of {it:groupvar} are used for the scores.


{title:Example}

{phang}{cmd:. nptrend exposure, by(group)}


{title:Also see}

{psee}
Manual:  {bf:[R] nptrend}

{psee}
Online:  {help epitab}, {helpb kwallis},
{helpb signrank}, {helpb spearman}, {helpb symmetry}
{p_end}