#### Answer

The mean is 11.1
The median is 11.3
The mode is 13.4
The range is 6.6
Median best describes the data set

#### Work Step by Step

The mean is the average of the data. Add all the numbers and divide by 9 $\frac{13.4+13.1+10.4+6.8+11.4+10.8+13.4+11.3+9.3}{9}$=11.1.The mean is 11.1
Arrange the values from least to greatest(6.8,9.3,10.4,10.8,11.3,11.4,13.1,13.4,13.4) to find the middle value.The median is 11.3
The mode is the number that occurs the most. 13.4 occurs twice so 13.4 is the mode.
The range is the difference between the largest and the smallest value:13.4-6.8=6.6. The range is 6.6
The median would best describe the data set because the data set has an outlier(6.8)