4. Johnson and Leone (Statistics and Experimental Design in Engineering and the Physical Sciences,..
4. Johnson and Leone (Statistics and Experimental Design in Engineering and the Physical Sciences, Wiley 1977) describe an experiment to investigate the warping of copper plates. The two factors studied were the temperature and the copper content of the plates. The response variable was a measure of the amount of warping. The data were as follows: Temperature (°C) 50 75 100 125 40 17,20 12,9 16,12 21,17 Copper 60 16,21 18,13 18,21 23,21 Content (%) 80 24,22 17,12 25,23 23,22 100 28,27 27,31 30,23 29,31 (a) Is there any indication that either factor affects the amount of warping? Is there any interaction between the factors? Use a=0.05. (b) Analyze the data, assuming that replicates are blocks. May 16 2022 05:45 PM
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