Answer
$H=0.94$ with a P-value $=0.624\gtα$. Do not reject the null hypothesis.
There is not enough evidence to conclude that the distributions of head injuries are not the same.
Work Step by Step
$H_0:$ the distributions of head injuries are the same.
versus
$H_1:$ the distributions of head injuries are not the same.
In MINITAB, enter the given data (see the picture). 1 corresponds to Large Family Cars, 2 corresponds to Passenger Vans, and 3 corresponds to Midsize Utility Vehicles.
Select Stat -> Nonparametrics -> Kruskal–Wallis
Enter C2 in Response and C1 in Factor
Click OK.
