A pharmaceutical manufacturer wants to investigate the bioactivity of a new drug. A completely randomized single-factor experiment was conducted with three dosage levels, and the following results were obtained.Utilize the data table in the DOE Add-in under the Chapter 3 Problems heading labeled '12'.

1. Is there evidence to indicate that the dosage level affects bioactivity?Use a = 0.05.
2. If it is appropriate to do so, make comparisons between the pairs of means.What conclusions can you draw?Alternatively, why were comparisons of pairs of means unnecessary?
3. Analyze the residuals from this experiment and comment thoroughly on the underlying assumptions and model adequacy. Graphs produced to answer this question can be inserted here and are encouraged.