哪里看出来红色部分？为什么24在13%到18%之间，25、26也在？

问题如下：

The bin containing the median return is:

选项：

3% to 8%

8% to 13%

13% to 18%

解释：

Because 50 data points are in the histogram, the median return would be the mean of the 50/2 = 25th and (50 + 2)/2 = 26th positions. The sum of the return bin frequencies to the left of the 13% to 18% interval is 24. As a result, the 25th and 26th returns will fall in the 13% to 18% interval.