看不懂这道题目的解释，能详细说明一遍吗?题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2017092702000041 老师，该题只考虑区间上限，那什么时候需要考虑区间下限
NO.PZ2017092702000041 0.333. 0.583. C is correct. The cumulative relative frequenof intervintifies the fraction of observations thare less ththe upper limit of the given interval. It is terminesumming the relative frequencies from the lowest intervup to aninclung the given interval. The following table shows the relative frequencies for all the intervals of the ta from the previous table: 如题、为什么累积相对频率不用考虑题中的下限
NO.PZ2017092702000041 请问为什么不是把基准收益附合在区间里的数据,加起来除以总累加收益?
0.333. 0.583. C is correct. The cumulative relative frequenof intervintifies the fraction of observations thare less ththe upper limit of the given interval. It is terminesumming the relative frequencies from the lowest intervup to aninclung the given interval. The following table shows the relative frequencies for all the intervals of the ta from the previous table: 老师、这个题的考核点是哪个？
请问为什么是7/12？条件1.17处如何考虑？
