NO.PZ2022123001000027
问题如下：
Annual returns and summary statistics for three funds are listed in the following exhibit:
The fund with the highest absolute dispersion is:
选项：
A.Fund PQR if the measure of dispersion is the range B.Fund XYZ if the measure of dispersion is the variance C.Fund ABC if the measure of dispersion is the mean absolute deviation解释：
The mean absolute deviation (MAD) of Fund ABC’s returns is greater
than the MAD of both of the other funds.
where
A and B are incorrect because the range and variance of the three
funds are as follows:
The numbers shown for variance are
understood to be in “percent squared” terms so that when taking the square
root, the result is standard deviation in percentage terms. Alternatively, by
expressing standard deviation and variance in decimal form, one can avoid the
issue of units. In decimal form, the variances for Fund ABC, Fund XYZ, and Fund
PQR are 0.0317, 0.0243, and 0.0110, respectively.
XYZ的range不是15-（-33）么？
