Answer
Mean:Brinks as collection contractor:1.55, not Brinks as collection contractor:1.73. Median:Brinks as collection contractor:1.55, not Brinks as collection contractor:1.65. It does not show evidence because the mean of Brinks employees is less than the mean of not Brink employees.
Work Step by Step
The mean can be counted by summing all the data and dividing it by the number of data: Brinks as collection contractor: $\frac{1.3+1.5+1.3+1.5+1.4+1.7+1.8+1.7+1.7+1.6}{10}=1.55$, not Brinks as collection contractor: $\frac{2.2+1.9+1.5+1.6+1.5+1.7+1.9+1.6+1.6+1.8}{10}=1.73$. The median is the average of the 1 or 2 (here 2) middle data: Brinks as collection contractor:(1.5+1.6)/2=1.55, not Brinks as collection contractor:(1.6+1.7)/2=1.65. It does not show evidence because the mean of Brinks employees is less than the mean of not Brink employees.
