下面這組數(shù)據(jù)的中位數(shù)是________,眾數(shù)是________.
37 38 41 42 37 43 37.
38 37
分析:(1)將這7個數(shù)據(jù)按照從小到大或從大到小的順序排列,數(shù)據(jù)個數(shù)是7為奇數(shù)個,則中間那個數(shù)據(jù)就是這組數(shù)據(jù)的中位數(shù);
(2)這7個數(shù)據(jù)中出現(xiàn)次數(shù)最多的數(shù)是37,則37就是這組數(shù)據(jù)的眾數(shù).據(jù)此進行解答.
解答:(1)將數(shù)據(jù)按照從小到大的順序排列為:
37、37、37、38、41、42、43,
這7個數(shù)據(jù)中位于中間的數(shù)據(jù)是38,
所以中位數(shù)為:38;
(2)數(shù)據(jù)中出現(xiàn)次數(shù)最多的數(shù)是37,
37就是這組數(shù)據(jù)的眾數(shù);
故答案為:38,37.
點評:此題考查一組數(shù)據(jù)的中位數(shù)和眾數(shù)的意義和求解方法,中位數(shù):將數(shù)據(jù)按照大小順序排列,如果數(shù)據(jù)個數(shù)是奇數(shù),則處于最中間位置的數(shù)就是這組數(shù)據(jù)的中位數(shù);如果數(shù)據(jù)個數(shù)是偶數(shù),則中間兩個數(shù)據(jù)的平均數(shù)是這組數(shù)據(jù)的中位數(shù);眾數(shù):一組數(shù)據(jù)中出現(xiàn)次數(shù)最多的那個數(shù).