-------------------------------------------------------------------------------
help for semean
-------------------------------------------------------------------------------

Calculate standard error of mean, optionally applying function

        semean varname [if exp] [in range] [, noprint function(string) ]


    varname may contain time-series operators; see help varlist.

    semean calculates the standard error of the mean of a variable.
    Optionally, a function of the variable may be applied prior to computation
    of the variable's statistics.

    This command was written as an illustration of ado-file development for
    Baum (2006). An egen function to compute the standard error of the mean is
    available in Nicholas Cox's egenmore package.

Options
    
    function(string) may be given in order to calculate statistics based on
        that transformation of the variable. Any valid Stata numeric function
        may be provided.

    noprint specifies that no output is to be produced. With or without this
        option, the mean, standard error of mean and number of valid
        observations are placed in the return vector.


Examples

    . webuse lutkepohl,clear

    . semean investment

    . semean linvestment

    . semean investment, func(log)

Author

    Christopher F. Baum, Boston College, USA
    baum@bc.edu


References

Christopher F Baum, 2006. An Introduction to Modern Econometrics with Stata.
College Station:Stata Press.


Also see

    On-line: egenmore (if installed)