420Hw04 - STAT 420 Homework #4 (10 points) (due Friday,...

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Fall 2008 Homework #4 (10 points) (due Friday, September 26, by 3:00 p.m.) 1. Hogg and Ledolter report on an engineer in a textile mill who studies the effects of temperature and time in a process involving dye on the brightness of a synthetic fabric ( brightness is measured on a 50-point scale ). Three observations were taken at each combination of temperature and time. Temperature Time (cycles) 350 ° F 375 ° F 400 ° F 40 38, 32, 30 37, 35, 40 36, 39, 43 50 40, 45, 36 39, 42, 46 39, 48, 47 Construct the ANOVA table and conduct tests for the interaction first and then, if appropriate, the main effects. Use α = 0.05 for each test. [ R. V. Hogg and J. Ledolter, Applied Statistics for Engineers and Physical Scientists , 2nd ed. ( New York: Macmillan, 1992 ). ] 2. The upper management at Initech wants to examine the relationship between the number of years on the job ( x ) and the number of TPS reports produced ( y ) for the middle-management employees. The data are as follows: x y 1 7 2 4 3 13 3 10 4 10
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420Hw04 - STAT 420 Homework #4 (10 points) (due Friday,...

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