Measures of Central Tendency (two data sets) 集中趨勢的量度(比兩組數據)
gMath 互動數學教室[br][url=http://www.gmath.hk/]http://www.gmath.hk[/url]
Information: Measures of Central Tendency (two data sets) 集中趨勢的量度(比兩組數據)