In an experiment to determine the factors affecting tensile strength in steel plates, the tensile strength (in
Question:
a. Predict the strength for a specimen that is 10 mm thick and contains 8.2 ppt manganese.
b. If two specimens have the same thickness, and one contains 10 ppt more manganese, by how much would you predict their strengths to differ?
c. If two specimens have the same proportion of manganese, and one is 5 mm thicker than the other, by how much would you predict their strengths to differ?
Transcribed Image Text:
The regression equation is Strength 26.641 3.3201 Manganese 0.4249 Thickness Predictor Constant Manganese Thickness Coef 26.641 3.3201 -0.4249 StDev 2.72340 0.33198 0.12606 9.78 10.00 -3.37 0.000 0.000 0.004 S 0.8228 R-Sq- 86.2% R-Sq(adj) -84.6% Analysis of Variance Source Regression Residua Error 17 Total DF 72.01 11.508 83.517 MS 36.005 0.6769 53.19 0.000 19
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