摘要：We present an analysis of a health survey data by multiple cor-respondence analysis (MCA) and multiple taxicab correspondence analysis(MTCA), MTCA being a robust L1 variant of MCA. The survey has onepassive item, gender, and 22 active substantive items representing healthservices o ered by municipal authorities; each active item has four answercategories: this service is used, never tried, tried with no access, non re-sponse. We show that the rst principal MTCA factor is perfectly charac-terized by the sum score of the category this service is used over all serviceitems. Further, we prove that such a sum score characterization alwaysexists for any survey data.
关键词：First factor success; multiple correspondence analysis; multiple;taxicab correspondence analysis; non response; outliers; sum score.
