The following table gives the survival times (in hours) for animals in an experiment who...

The following table gives the survival times (in hours) for animals in an experiment whose design consisted of three poisons, four treatments, and four observations per cell.

a. Conduct a two-way analysis of variance to test the effects of the two main factors and their interaction.

b. Box and Cox (1964) analyzed the reciprocals of the data, pointing out that the reciprocal of a survival time can be interpreted as the rate of death. Conduct a two-way analysis of variance, and compare to the results of part (a). Comment on how well the standard two-way analysis of variance model fits and on the interaction in both analyses.