The mosaic plot on the next page shows the sales of cigarettes by the three leading manufacturers, divided into six international regions. (Total sales in 2006 were approximately 2 trillion.)
(a) In which region are total cigarette sales the largest?
(b) In which two regions does British-American Tobacco command more than half of the market?
(c) Which share leads to higher sales: 80% of the market in the United States and Canada (like that of Philip Morris) or 80% of the market in Asia and the Pacific?
(d) Can you easily tell what percentage of Philip Morris’s sales is in western Europe?
(e) Are brand and region associated?