... 

Statistics Toolbox Software Version $5.2 (R2006a)$;

$http://www.mathworks.com/access/helpdesk/help/toolbox/stats/rn/bqmfe_z-10.html$

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... MATLAB 

MATLAB Version $7.2.0.283 (R2006a)$;

$http://www.mathworks.com/access/helpdesk/help/techdoc/rn/f0-68730.html$

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