NO.PZ2017092702000041
问题如下：
An analyst is using the data in the following table to prepare a statistical report.
The cumulative relative frequency for the interval -1.71% ≤ x < 2.03% is closest to:
选项：
A.0.250.
B.0.333.
C.0.583.
解释：
C is correct.
The cumulative relative frequency of an interval identifies the fraction of observations that are less than the upper limit of the given interval. It is determined by summing the relative frequencies from the lowest interval up to and including the given interval. The following table shows the relative frequencies for all the intervals of the data from the previous table:
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?
