认识中位数ppt课件.ppt

, , : ,2500,1900,900,800,750,650,600,500,400,2500,1900,900,800,750,650,600,500,400, ：, ,2500,1900,900,800,750,650,600,500,400, , ,3 10 17 30 10,3 10 10 17 30,: 10,大到小, , ,1,2,3,4,5,6,7,8,50,89,88,90,98,92,95,95,88,89,90,92,95,95,98,(90+92) 2=91,: 91,大到小, 。, , , ,/分,1,2,3,4,5,6,7,8,50,89,88,90,98,92,95,95,50,88,89,90,92,95,95,98,(90+92) 2=91,: 91, ,106 103 104 120 107 33 98 97,33 97 98 103 104 106 107 120,: 103.5。,(103+104) 2=103.5,大到小, , 1、。,. . ,5- ( ) .,(2) 2- 8 32 50 86 82 89 928596 ( ) . （,(3) 4- 7 : 89 88 90 92 88 91 93 ( ) .,C,A,B,B,A,C,C, ,2 9 . (: ,86 84 50 92 87 80 83 43 88, ,(2) 9 .,(3) 9 , ,86,(4) 50 8 ,84,50,92,87,80,83,43,88, ,86,(5) 43 7 7 ,84,92,87,80,83,43,88,3、2、6、5、20, ：7.2, ：5, ,3、2、60、62、68、65, ：43.33, ：61, , , , , , ！,