Answer
7.0 is an outlier because it is a lot more than the valus in the Data Set.
Work Step by Step
The mean can be counted by summing all the data and dividing it by the number of data: for white drivers: $\frac{0.7+2.2+...+1.39}{50}=1.184$. The median is the average of the 1 or 2 (here 2) middle data:(1.22+1.25)/2=1.235. 7.0 is an outlier because it is a lot more than the values in the Data Set.