svy_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}
{* 29mar2005}{...}
{cmd:help svy: mean}{...}
{right:dialog:  {bf:{dialog svy_mean}}{space 16}}
{right:also see:  {help "svy: mean postestimation"}}
{hline}

{title:Title}

{p2colset 5 24 26 2}{...}
{p2col :{hi:[SVY] svy: mean} {hline 2}}Estimate means for survey data{p_end}
{p2colreset}{...}


{title:Syntax}

{p 8 42 2}
{cmd:svy} [{it:vcetype}]
	[{cmd:,} {it:svy_options}]
	{cmd::} {cmd:mean} {varlist} {ifin} [{cmd:,} {it:options}]


{synoptset 27 tabbed}{...}
INCLUDE help svy_sum_optable


{synopthdr:options}
{synoptline}
{syntab:Model}
{synopt :{opt std:ize(varname)}}variable
	identifying strata for standardization{p_end}
{synopt :{opt 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 :{opt over}{cmd:(}{it:varlist} [{cmd:,} {opt nolab:el}]{cmd:)}}identify
	multiple subpopulations{p_end}
{synoptline}
{p2colreset}{...}


{title:Description}

{pstd}
{cmd:svy: mean} produces estimates of finite-population means from survey
data; see {helpb mean} for a description of sample means from nonsurvey data.


{title:Options}

{phang}
{it:svy_options}; see {helpb svy}.

{dlgtab:Model}

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

{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 svy_sum_opdesc


{title:Examples}

{phang}
{cmd:. webuse nmihs}
{p_end}
{phang}
{cmd:. svyset [pw=finalwgt], strata(strata)}
{p_end}
{phang}
{cmd:. svy: mean birthwgt}
{p_end}
{phang}
{cmd:. svy: mean birthwgt, over(race)}
{p_end}

{phang}
{cmd:. webuse nmihs}
{p_end}
{phang}
{cmd:. svyset [pw=finalwgt], strata(strata)}
{p_end}
{phang}
{cmd:. svy: mean birthwgt, over(race marital)}
{p_end}

{phang}
{cmd:. webuse nmihs}
{p_end}
{phang}
{cmd:. svyset [pw=finalwgt], strata(strata)}
{p_end}
{phang}
{cmd:. svy, subpop(if race == "black":race) nolegend:}
{cmd:mean birthwgt, over(marital)}
{p_end}


{title:Also see}

{psee}
Manual:  {bf:[SVY] svy: mean}

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