Average value:

Zhang =9.5, Li =9.6.

Median:

Zhang: 9.6, Li: 9.6

After removing the highest score and the lowest score in each set of data "

Average value:

Zhang =9.56, Li =9.62.

Median:

Zhang: 9.6, Li: 9.6

The average is changing and the median is unchanged.

Because the maximum or minimum is likely to affect the average, but the median is not affected.