mean.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}
{* 21mar2005}{...}
{cmd:help mean}{right:dialog:  {bf:{dialog mean}}{space 15}}
{right:also see:  {help mean postestimation}}
{hline}

{title:Title}

{p2colset 5 17 19 2}{...}
{p2col :{hi:[R] mean} {hline 2}}Estimate means{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 13 2}
{cmd:mean} {varlist} {ifin} {weight} [{cmd:,} {it:options}]

{synoptset 21 tabbed}{...}
{synopthdr}
{synoptline}
{syntab :Model}
{synopt :{opth std:ize(varname)}}variable identifying strata for standardization{p_end}
{synopt :{opth stdw:eight(varname)}}weight variable for standardization{p_end}
{synopt :{opt nostdr:escale}}do not rescale the standard weight variable{p_end}

{syntab :if/in/over}
{synopt :{cmd:over(}{it:{help varlist}}{cmd:,} {it:...}{cmd:)}}identify multiple subpopulations{p_end}

{syntab :SE/Cluster}
{synopt :{opth vce(vcetype)}}{it:vcetype} may be {opt boot:strap}
or {opt jack:knife}{p_end}
{synopt :{opth cl:uster(varname)}}adjust standard errors for intragroup correlation{p_end}

{syntab :Reporting}
{synopt :{opt l:evel(#)}}set confidence level; default is {cmd:level(95)}{p_end}
{synopt :{opt noh:eader}}suppress the table header{p_end}
{synopt :{opt nol:egend}}suppress the table legend{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2}
{opt svy} may be used with {opt mean}; see {helpb "svy: mean"}.{p_end}
{p 4 6 2}
{opt fweight}s, {opt pweight}s, {opt aweight}s, and {opt iweight}s are
allowed; see {help weight}.{p_end}
{p 4 6 2}
See {help mean postestimation} for features available after estimation.{p_end}


{title:Description}

{pstd}
{opt mean} produces estimates of means, along with standard errors.


{title:Options}

{dlgtab:Model}

{phang}
{opth stdize(varname)}
specifies that the point estimates be adjusted by direct standardization
across the strata identified by {it:varname}.  This option requires the
{opt stdweight()} option.

{phang}
{opth stdweight(varname)}
specifies the weight variable associated with the strata identified in the
{opt stdize()} option.  The standardization weights must be constant within the
strata identified in the {opt stdize()} option.

{phang}
{opt nostdrescale}
prevents the standardization weights from being rescaled within the
{opt over()} groups.  This option requires {opt stdize()} but is ignored if
the {opt over()} option is not specified.

INCLUDE help srs_sum_opdesc


{title:Examples}

{phang}{cmd:. mean mpg1 mpg2}{p_end}

{phang}{cmd:. stack mpg1 mpg2, into(mpg) clear}{p_end}
{phang}{cmd:. mean mpg, over(_stack)}

{phang}{cmd:. mean hbp, over(city year) stdize(strata) stdweight(stdw)}


{title:Also see}

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

{psee}
Online:  {help mean postestimation};{break}
{helpb proportion},
{helpb ratio},
{helpb "svy: mean"},
{helpb total}
{p_end}