Problem 1.6. (4 points) - The Cell Means model, yij: : p..- + 35 has as one of its assumptions that the Fig-'15 are random: independent observations from the treatment populations- 3. What could the statistician do during the conduct of the experiment in order to ensure that the condition of random, independent observations is reasonable valid? in. What condition is required of the yij's in order for the least squares estimators of pt..- to be best linear unbiased estimators? c. What condition is required of the ygj's in order to validly use the F-test in ADV hypotheses and to place condence intervals on the nij's? (1. Suppose the condition from part c. is not valid. How could you test for differences in the treatment means