Question

18．一組數(shù)據(jù)的中位數(shù)可能與平均數(shù)相等．√ （判斷對(duì)錯(cuò)）

Answer 1

分析 平均數(shù)的求法：用所有數(shù)據(jù)相加的和除以數(shù)據(jù)的個(gè)數(shù)；中位數(shù)的求法：將數(shù)據(jù)按大小順序排列，如果數(shù)據(jù)個(gè)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(gè)數(shù)是偶數(shù)，則中間兩個(gè)數(shù)據(jù)的平均數(shù)是這組數(shù)據(jù)的中位數(shù)；根據(jù)求法可知一組數(shù)據(jù)的平均數(shù)和中位數(shù)有可能相等．

解答 解：一組數(shù)據(jù)的平均數(shù)和中位數(shù)有可能相等．
故判斷為：√．

點(diǎn)評(píng) 此題考查一組數(shù)據(jù)的平均數(shù)和中位數(shù)能否相等．