67. A new type of graph question, 30 students in a certain, please refer to the above graphic which indicate the relationship between the no of students and the frequency they did certain activity (not accurate), ask what’s probability for a student to did certain activity more than 1 time of the median (or average!! 友情提醒,一定要注意这个好像是Median我算成average了) of the group
横轴加起来不是30,所以猜测纵轴为学生数,横轴为频率 Median是大于8次的,〉8的学生有7+8=15人, P=15/30=1/2 V2
a chart, show how many students taking how much time to finish a task ask percentage
calculate the first two bars and the last bar 8/8? V2
a chart, show how many students taking how much time to finish a task ask percentage
calculate the first two bars and the last bar V3
一个柱状图的题目,回来翻看JJ发现原来里面有,不过考试时候完全不记得有见过~补充一下,好像是讲一帮同学完成一项作业的天数,x轴是同学完成的天数,大概是1-5的样子,y轴是人数,具体每项都不超过10人。问题好像是问有多少个学生用的天数是比average多一天的,最后楼主算出来average是3点多,所以排除了4天的人数,选了5天的人数。计算时只要搞清计算average的时候除数是什么就ok了。 就是最后两个column占多少百分比 纵轴是学生数 横轴是频数 这题的意思是不是有2个学生1次;6个学生5次;7个学生8次;7个学生10次;8个学生15次? 中位数啊 第十五、十六个 平均一下 (8+10)/2=9 中位数是:9 中位数是9
≥10就可以 (数学讨论稿答案对,中位数算错) |