In recent years there has been much discussion of the relative merits of several methods of fitting the normal integral dosage response curve. For a three-dose experiment with ten observations at each dose and for a five-dose experiment with four observations, three methods are compared with respect to their root mean square error in estimatingm, σ, and β. Essentially the total population of samples is used. The main result is that the maximum likelihood method is superior to the minimum normit method in estimatingmand σ, but for β the minimum normit method is superior.