问题如下：
If the observations in a data set have different values, is the geometric mean for that data set less than that data set’s:
选项：
harmonic mean?
arithmetic mean?
No
No
No
Yes
Yes
No
解释：
B is correct.
Unless all the values of the observations in a data set have the same value, the harmonic mean is less than the corresponding geometric mean, which in turn is less than the corresponding arithmetic mean. In other words, regarding means, typically harmonic mean < geometric mean < arithmetic mean.
请问该如何记忆这道题目的结论呢？
