An article reports an experiment to predict various properties of titanium welds. Among other properties, the elongation (in %) was measured, along with the oxygen content and nitrogen content (both in percent). The following MINITAB output presents results of fitting the model Elongation = β0 + β1Oxygen + β2Nitrogen + β3Oxygen·Nitrogen a) Find a 98% confidence interval for the coefficient of the interaction term Oxygen•Nitrogen. Round the answers to two decimal places.
An article reports an experiment to predict various properties of titanium welds. Among other properties, the elongation (in %) was measured, along with the oxygen content and nitrogen content (both in percent). The following MINITAB output presents results of fitting the model Elongation = β0 + β1Oxygen + β2Nitrogen + β3Oxygen·Nitrogen a) Find a 98% confidence interval for the coefficient of the interaction term Oxygen•Nitrogen. Round the answers to two decimal places.
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Author:Amos Gilat
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An article reports an experiment to predict various properties of titanium welds. Among other properties, the elongation (in %) was measured, along with the oxygen content and nitrogen content (both in percent). The following MINITAB output presents results of fitting the model
Elongation = β0 + β1Oxygen + β2Nitrogen + β3Oxygen·Nitrogen
a) Find a 98% confidence interval for the coefficient of the interaction term Oxygen•Nitrogen. Round the answers to two decimal places.

Transcribed Image Text:The regression equation is
Elongation = 46.80 - 130.11 Oxygen
807.1 Nitrogen + 3580.5 Oxy Nit
Coef
46.802
- 130.11
- 807.10
3580.5
SE Coef
3.702
20.467
158.03
958.05
Predictor
12.64
0.000
0.000
0.000
0.001
Constant
Oxygen
Nitrogen
Oxy Nit
S = 2.809
- 6.36
- 5.107
3.737
R-Sq
74.5%
R-Sq(adj) = 72.3%
Analysis of Variance
DF
Source
Regression
Residual Error
Total
SS
805.43
276.11
1081.54
MS
268.48
7.89
34.03
0.000
35
38
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