An experiment was designed for personnel in the Department
Chapter 13, Problem 13.46(choose chapter or problem)
An experiment was designed for personnel in the Department of Animal Science at Virginia Tech to study urea and aqueous ammonia treatment of wheat straw. The purpose was to improve nutritional value for male sheep. The diet treatments were control, urea at feeding, ammonia-treated straw, and urea-treated straw. Twenty-four sheep were used in the experiment, and they were separated according to relative weight. There were four sheep in each homogeneous group (by weight) and each of them was given one of the four diets in random order. For each of the 24 sheep, the percent dry matter digested was measured. The data follow.
(a) Use a randomized complete block type of analysis to test for differences between the diets. Use \(\alpha = 0.05\).
(b) Use Dunnett’s test to compare the three diets with the control. Use \(\alpha = 0.05\).
(c) Do a normal probability plot of residuals.
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