{smcl}
{* 24may2006}{...}
{cmd:help tcod}
{hline}

{title:Title}

{p2colset 5 15 17 2}{...}
{p2col :{hi:tcod} {hline 2}}Displays standard and bootstrap confidence intervals for the coefficient of dispersion (COD) & performs Gloudemans’ COD Tolerance Tests. {p_end}
{p2colreset}{...}
    

{title:Syntax}

{p 8 17 2}
{cmd:tcod}
{varname}
{ifin}
[{cmd:,} {it:options}]

{synoptset 10 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Options}
{synopt :{opt l:evel(#)}}sets confidence level (in percent). The default is {cmd:level(95)} or as set by {cmd:set level}; see {helpb level}{p_end}
{synopt :{opt s:tdr(#)}}sets the values of the required standards. The default is {cmd:stdr (15)}{p_end}
{synopt :{opt r:eps(#)}}specifies the number of bootstrap replications to be performed;  the default is {cmd:reps (50)}. The bootstrapped confidence 
interval reported is the BCa confidence interval.{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2}
{opt by} may be used with {opt tcod}; see {helpb by}.
{p_end}


{title:Description}

{pstd}
{opt tcod} computes the confidence intervals for the COD, the maximum acceptable COD, and tests the hypothesis that the COD meet the performance standards 
for the uniformity of assessments.

{pstd}
With the {opt by} option, {opt tcod} allows you to display the output by categories of a grouping variable. 

{pstd}
{opt tcod} takes, as input, one scale variable. In appraisal ratio studies, this variable could be the appraisal or assessment ratio.  

{title:Examples}

{cmd:. tcod  Ratio  }
{cmd:. by Strata, sort : tcod  Ratio}
{cmd:. tcod  Ratio, stdr(15 20 25) reps(5000)}

{title:Author} 


{p 4 4 2}Benmamoun, Mamoun, Boeing Institute of International Business, Saint Louis University , Saint Louis, MO, U.S.A. 
Email {browse "mailto: vmamoun@yahoo.com": vmamoun@yahoo.com} if you observe any problem or if you have any comment or question.
	
{title:Remarks} 

{p 4 4 2}For detailed information , see Gloudemans, R. J. 2001. Confidence Intervals for the COD: Limitations and Solutions.  Available online at http://www.agjd.com/COD.pdf.

{title:Acknowledgement} 

{p 4 4 2}This program is based on the distingusihed work of Gloudemans, Robert J.   

{title:Also see}

{psee}
Online:  {helpb bootstrap}, {helpb sratio}, {helpb codci} {p_end}