The concept of average

As the name suggests, the average is the average of all values, which is a relatively simple statistical concept.

The mean is the average value obtained by weighting all possible values ??of X according to their probability of occurrence.

For example:

1. The annual yields of a certain bond investor in recent years from low to high are -16%, 4%, 5%, 5%, 6 %, 8%, then the average returns of the investor are () and () respectively.

A.5%

B.12%

C.2%

D.6%

Answer: C

Analysis: The average value is the average value obtained by weighting all possible values ??of X according to their probability of occurrence. Mean=(-16%+4%+5%+5%+6%+8%)/6=2%.