Question: Please help me answer the following questions, thanks! The cloud point of a liquid is a measure of the degree of crystallization in a steel:

Please help me answer the following questions, thanks!

Please help me answer the following questions,Please help me answer the following questions,
The cloud point of a liquid is a measure of the degree of crystallization in a steel: that can be measured by the refractive index. It has been suggested that the percentage of 1-3 in the base steel: is an exeellent predictm- of cloud point using the second-order model: Y=D+31X+11X2+ The felimtring data were collected on stocks with knewn percentage of [-3. I-8 Cloud Point I-8 Cloud Point 22.1 2 26.1 24.5 4 28.5 26.0 30.3 26.8 31.5 28.2 33.1 28.9 22.8 30.0 27.3 30.4 29.8 31.4 31.8 21.9 1. Determine the best fitting second-order model. 2. Using o = 0.05, check the overall regression. 3. Test for lack of fit. 4. Would the first-order model, Y = Bo + 81X + 6, have been sufficient? Use the residuals from this simpler model to support your conclusions. 5. Comment on the use of the fitted second-order model as a predictive equation

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