9. Tuna, continued Refer to Exercise 8. The hypothesis tested in Chapter 11—that the average prices for the four types of tuna are the same—is equivalent to saying that E(y) will not change as 1 x and 2 x change. This can only happen when 0 1 2 3 b 5b 5b 5 . Use the MINITAB printout for the one-way ANOVA shown below to perform the test for equality of treatment means. Verify that this test is identical to the test for significant regression in Exercise 8

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One-way ANOVA: Light Water, White Oil, White Water, Light Oil Analysis of Variance DF Adj SS Adj MS F-Value P-Value 3 0.9223 0.3074 33 6.8104 0.2064 Source Factor Error Total 36 7.7328 Model Summary S 0.454287 11.93% 1.49 0.235 R-sq R-sq(adj) R-sq(pred) 3.92% 0.00%