9.3 In an experiment with t 4 populations means, consider the four linear combinations of those means 1224 a. Which of the four linear combinations are contrasts? b. Which pairs of contrasts are...

9.3 Question is in the attached picture.

Extracted text: 9.3 In an experiment with t 4 populations means, consider the four linear combinations of those means 1224 a. Which of the four linear combinations are contrasts? b. Which pairs of contrasts are orthogonal? c. Suppose we have two contrasts: 1 1 2 33H4 and 2= 31342 + Is testing Ho: 0 equivalent to testing Ho: l2 0? Justify your answer.