ST 512 Quiz: ST 512 NCSU Quiz3 Fall06 key
Document Summary
Quiz 3-solutions: (taken from ott and longnecker, ch. 17) an experiment measures tablet hardness by randomly selecting three batches of a formulation for a drug, then randomly selecting three 1-kg samples from each of these batches. Then 7 tablets are sampled from each of the 9 samples and hardness readings (y) are taken on each with the following results: The sas code and output at the end of the quiz, entitled tablet problem , Ts the wrong model, but the correct sums of squares required for inference may be recovered easily, using the following algebraic fact. = 1. 26, df = 6, 54: report the f -ratio and associated df for a test of equality of batch means. = 118. 1 df = 2, 6: consider two experimental designs for an investigation of the growth of grass using four di erent nitrogen additives: n1, n2, n3 and n4. A plot divided into 16 sections (4 4) is to be used.
