4. 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 这题什么意思....没看懂....................
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发表于 2011-2-27 03:54:57
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