Question: 3.24. Four different designs for a digital computer circuit are being studied to compare the amount of noise present. The following data have been obtained:
3.24. Four different designs for a digital computer circuit are being studied to compare the amount of noise present. The following data have been obtained:

(a) Is the same amount of noise present for all four designs? Use ( $ 0.05.
(b) Analyze the residuals from this experiment. Are the analysis of variance assumptions satisfied?
(c) Which circuit design would you select for use? Low noise is best.
Circuit Design Noise Observed 1 19 20 19 30 8 234 2 80 61 73 56 88 80 47 26 25 35 50 4 95 46 83 78 97
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