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何谓众数?书中描述:一组数据中出现次数最多的数,就是这组数据的众数。如:7、3、5、6、7、4、7、3、5、7,这组数据的众数是7。显然,它的意义浅显易懂。可就是这个浅显易懂的众数给我们的教学平生出许多许多事端来。案例一“领口尺寸”是众数吗?北师大版第十册数学教材“统计”单元中关于“中位数和众数”一节的练习有这样一道题:某商店销售5种领口尺寸分别为:38cm、39cm、40cm、41cm、42cm的衬衫.为了了解各种领口衬衫的销售情况,商店统计了某月的销售情况(见下表)
What is the mode? The book describes: a group of data appear in the most number, is the mode of this group of data. Such as: 7,3,5,6,7,4,7,3,5,7, the mode of this set of data is 7. Obviously, its meaning is easy to understand. But it is this easy to understand style that gives us many things in our teaching. Case 1 “collar size ” is the mode? Beijing Normal University version tenth mathematics textbooks “Statistics ” unit on the “Median and Mode ” section exercises this question: a The shop sells five kinds of shirt with 38cm, 39cm, 40cm, 41cm and 42cm neckbands respectively. The sales statistics of the month are as follows (see table below)