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This paper proposed the idea that the growth of an individual organism follows a mathematical model very closely and that different individuals follow different members of the same parametric family of models. This idea implies that the variation observed between individuals measured at the same time arises not from an additive term as has been previously supposed, but primarily from variation of the parameters of the model. A graph of data from an experiment on chickens is included which points up this individuality and the increased variation resulting from the passage of time. The four models considered were growth curves employing two, three, and four parameters with biological interpretations existing for the parameters. The parameters were allowed to follow independent uniform distributions and independent gamma distributions. Master of Science

These few examples present further illustration of the fact that the Pearson approximations are very adequate for many practical purposes, and may be regarded a justifiable procedure if the true distribution is not known. The purpose of this paper was the preparation of improved, tables which may lead to more extensive comparative studies of this kind. Master of Science