《初中数学八年级下册53频数与频率ppt课件》由会员分享，可在线阅读，更多相关《初中数学八年级下册53频数与频率ppt课件（11页珍藏版）》请在金锄头文库上搜索。
1、(A)大卫.贝克汉姆(B)德尔.皮耶罗 (C )罗纳尔多 (D)罗纳尔迪尼奥(1)请选出自己喜欢的足球明星。(2)请说出哪个明星最受欢迎? 从上面可以看到A,B,C,D，它们出现的次数有的多,有的少,或者说它们出现的频繁程度不同.我们称每个对象出现的次数我们称每个对象出现的次数为频数为频数(absolute frequency) 每个对象出现的次数与总次数的比值为频率relative frequency). American American schools schools begin begin in in September September after after a a long l
2、ong summer summer holiday. holiday. There There are are two two terms terms in in a a school year. The first term is from September to January, and the second is from February to June. school year. The first term is from September to January, and the second is from February to June. High High school
3、 school students students take take only only four four or or five five subjects subjects each each term. term. They They usually usually go go to to the the same same classes classes every every day, day, and and they they have have homework homework for for every every class. class. After After cl
4、ass class they they do do many many interesting interesting things. . things. . 随机抽取2段英语短文，统计2段短文中的“a”，“i”，“e和“o的出现次数，分别求出它们的频数和频率。同学们能否将第1段英语短文统计的数据用适当的图表表示出来。 字母次数调查你们班级同学上周末活动情况，并将统计数据用适当的图表表示出来。（玩游戏、看电视、看书写作业、外出游玩等）（1） 你认为在汉字中“的和“了的使用频率哪个高？（2看法相同的几个同学组成一个小组，设计一个简单的调查方案，粗略地估计一下它的使用频率，并将调查结果在全班交流。 书本P164及作业本再见！再见！
