Are the distributions of functionality the same for two types of ankle repair? An orthopedist installs hardware in the repair of broken ankles in n 5 19 patients.7 He randomly selects two groups: leave the hardware in place after adequate healing (n1 5 10) and remove it (n2 5 9). He judges the post healing percent functionality of the ankle joint. In assessing the relative success of the two groups, he observes that their distributions are far from normal in shape. However, are the distributions both the same, whatever they may be? His data are as in Table 13.19.

Perform a KS test of equality of distributions using α 5 0.05.