For five consecutive months, the rate of return is - 3%, - 6%, - 12%, 3% and 6%. The distribution can be described as:
A
positively skewed
B
negatively skewed
C
no obvious features
答案为B
请问，如果用比较中位数和平均数的方法：中位数为-3%，算术平均为-2.4%，几何平均（period return）为-2.6%，无论如何都是平均数比较大，应该是正偏呀？虽然我也看得出来这里是负偏。
