Answer
See answer below
Work Step by Step
Mean$= \frac{8.2+9.3+8.5+8.8+9.0}{6}=8.76 \approx 9$
$8.2$ $8.5$ $8.8$ $9.0$ $9.3$
Median $\rightarrow 8.8$
There is no mode.
Because there is not an outlier, the mean is the best measure to describe the data set.