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1. Some tests were carried out on a newly designed carburetor. Four variables were studied as follows: + Variable A B С
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1. Some tests were carried out on a newly designed carburetor. Four variables were studied as follows: + Variable A B С
1. Some tests were carried out on a newly designed carburetor. Four variables were studied as follows: + Variable A B С D Description Spring tension Air gap Aperture Size Gas flow rate low narrow small slow high open large rapid The immediate objective was to find the effects of these changes on the amount of unburned hydrocarbons in the engine exhaust gas. The following results were obtained from a 24-1 design: A A C D B + + + + + Run 1 2 3 4 5 6 7 8 Unburned hydrocarbons 8.2 1.7 6.2 3.0 6.8 5.0 3.8 9.3 + . + + + + The researcher wants to find a combination of A, B, C, and D that will minimize the levels of unburned hydrocarbons. Analyze this data using an appropriate modification of Yates' method. Use the results of this analysis to make some recommendations about further experiments that might be conducted.
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