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:
老师、这个题的考核点是哪个？
