013080 EEET 5003 Design and Analysis of Experiments, Tests and Trials Page 1 DESIGN AND ANALYSIS OF EXPERIMENTS, TESTS AND TRIALS ASSIGNMENT September 2012 ? It is expected that you use Minitab to perform the necessary analyses for this assignment. All relevant plots and outputs from the session window should be included in your submission. ? All response variable names in Minitab must have your last name added to the end so that all plots and tables include your last name. Document Preview: 013080 EEET 5003 Design and Analysis of Experiments, Tests and Trials Page 1 DESIGN AND ANALYSIS OF EXPERIMENTS, TESTS AND TRIALS ASSIGNMENT September 2012 ? It is expected that you use Minitab to perform the necessary analyses for this assignment. All relevant plots and outputs from the session window should be included in your submission. ? All response variable names in Minitab must have your last name added to the end so that all plots and tables include your last name. For example, in Q1, I could name the response variable Feed Rate YOUR_SURNAME You will have half your marks deducted for any question in which you have not named the response variable using this convention and included it in tables and plots. ? Unless otherwise stated you may assume ?=0.05 The due date for the Assignment is 5.00 pm 26 October 2012. Please submit your assignment using Gradebook. QUESTION 1 Four different feed rates for a CNC machine were investigated to see whether the feed rate affected the variation of a critical dimension of the part being produced by the machine. Five measurements of the standard deviation of the critical dimension (in 10-3 mm) were obtained for each run rate, and are shown in the following table. Assume that the run order was randomised. Feed Rate (cm/minute) Production Run 1 2 3 4 5 10 0.09 0.10 0.13 0.08 0.07 12 0.06 0.09 0.12 0.07 0.12 14 0.11 0.08 0.08 0.05 0.06 16 0.19 0.13 0.15 0.20 0.11 a) Does the feed rate have an effect on the standard deviation of the critical measurement? b) Use the residuals from this experiment to investigate model adequacy. Are there any problems with experimental validity? Total 10 marks QUESTION 2 Construct a 2IV7-3 optimal design. What is the defining relation for the design? What effects, up to and including 3-factor interactions, are aliased with A, DE, BCD? Provide a list of the runs in the order in which they would be performed in an experiment. Total 10 marks 013080 EEET 5003 Design and Analysis of Experiments, Tests Attachments: EEET-5003-SP6.pdf