Insulin pumps are used by diabetic patients to control blood glucose levels, but a side...

Insulin pumps are used by diabetic patients to control blood glucose levels, but a side effect, diabetic ketoacidosis (DKA), may occur. Mecklenburg et al. (1984) gathered data on incidence of DKA before and after pump therapy, shown in the following table. Test whether the rate of DKA is the same before and after therapy.