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The completed Mediamark sample consists of over 25,000 respondents. Each year the <br /> sample is completely redrawn,with 13,000 new respondents entering the survey <br /> every six months. 2,400 new clusters are selected yearly from a continuously updated <br /> master list. <br /> Resulting data is weighted to reflect the probabilities of selection inherent in the <br /> sample design and then balanced so that major study demographics match the most <br /> recent independent estimates. Weighting and subsequent balancing are accomplished <br /> within the male and female portions of the sample. The samples are then balanced on <br /> a set of population parameters. <br /> For more information, see http://www.mediamark.com and follow The Survey of the <br /> American Consumer. <br /> Page 19 <br />