Question: A certain fraction of antibiotics injected into the bloodstream are “bound” to serum proteins. This is a phenomenon of considerable pharmacological importance, because as the extent of the binding increases, the systemic uptake of the drug decreases. This, in turn, bears directly on the effectiveness the medication will ultimately have. In a recent study, determinations were made of the binding percentages characteristic of five widely used antibiotics: penicillin G (I), tetracycline (II), streptomycin (III), erythromycin (IV), and chloramphenicol (V). Bovine serum was used in each instance, but the results are comparable to what could be expected in human serum. Are the true binding percentages for the five antibiotics tested all equal? Let α = 0.05.