All economic decisions are made basedupon statistics,which are supposed to comefrom facts in real life.However,people aresometimes baffled by the conclusions drawnfrom different statistics,which present differ-ent pictures of our lives and society.Consumer Price Index(CPI),one of theprice indexes that government normally usesto judge the cost of living,measures the pricesof a fixed market basket of some 300 con-sumer goods and services purchased by a“typ-ical”urban consumer(McConnell & Brue,p.