quiz04.sp02

quiz04.sp02 - Test 4 St 512 Spring 2202 Dickey 1. I am...

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Sheet1 Page 1 Test 4 St 512 Spring 2202 Dickey 1. I am planning an experiment with fish that involves their food (F at 2 levels) and water salinity (S at 4 equally spaced levels: 10, 20, 30, 40). Each fish must be exposed to its treatment for 1 week and must be in an isolated tank. I have 10 of these experimental tanks and can use some or all of them in any given week. I also have 56 fish in a large holding tank and will use these to generate 7 replicates of my 2x4 factorial treatments. I am somewhat concerned about the fish since they were just recently caught in the wild and there may be some effect of being held for an extended period in the holding tank, but I have no choice. The response variable Y is the level of a certain chemical from the food that is absorbed in the fish tissue. I am willing to assume that the effect of holding time does not interact with the treatments. (A) (10 pts.) In this description, what tells you that this experiment should be blocked and how would you do the blocking? (B) We have these treatment totals: salinity food 10 20 30 40 1 168 147 98 77 2 217 168 112 49 totals 385 315 210 126 and from a book we find the orthogonal polynomial coefficients
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quiz04.sp02 - Test 4 St 512 Spring 2202 Dickey 1. I am...

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