Question

please provide minitab outputs and instructions

2. A mechanical engineer is studying the thrust force developed by a drill press. He suspects that the drilling speed and the feed rate of the material are the most important factors. He selects four feed rates and uses a high and low drill speed chosen to represent the extreme operating conditions. He obtains the following results. Feed Rate (B) Drill Speed 0.015 0.030 0.045 0.060 2.83 2.76 3 3 125 2.72 2.55 2.65 2.78 2.53 2.67 7 2.83 2.85 2.89 2.96 2.86 2.83 2.87 200 2.89 Fit a full quadratic regression model to predict the thrust force as a function of Feed rate and Drill speed. Use α a. 0.05 i. State the hypotheses ii. What is the value of the test statistic? iii. What is the p-value? iv. What is the decision? v. Make conclusions b. Test the hypothesis for the quadratic coefficient individually for Feed rate. i. State the hypotheses ii. What is the value of the test statistic? ili. What is the p-value? iv. What is the decision? v. Make conclusions c. Fit the bes t regression model to predict the thrust force as a function of Feed rate and Drill speed. Use α 0.05, write down the resulting model d. Analyze the residuals from the model in part c). Are the basic analysis of variance assumptions satisfied? e. Find the best operating conditions to maximize thrust force

Answer 1

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