FinalPart1.pdf - 1 STAT 359\/563(Spring 2018 Final examination Part 1 Name Student ID Due 1:00pm April 19(DTB A439 Instructions 1 Data analysis can be

FinalPart1.pdf - 1 STAT 359/563(Spring 2018 Final...

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1 STAT 359/563 (Spring 2018) Final examination: Part 1 Name: Student ID: Due: 1:00pm, April 19 (DTB A439) Instructions: 1. Data analysis can be done in software R on a computer. 2. There are 2 questions in Part 1 of final examination. For each question, write out your solution carefully and completely. Marks will be deducted for incomplete or poorly presented solutions. Question 1 2 Total Marks
STAT 359/563 2 1.(15 marks) An experiment was performed to study the relationship between aresponse variableYand three independent variables,x1, x2andx3. The data setis given in “FinalData1.csv” (CourseSpace).Find a model that “best” describesthe relationship betweenYand the three independent variables.Start with thefollowing model including all the interactions amongx1, x2andx3,lm(Yx1*x2*x3)and search for the best model. Write a report for the analysis, including the summarystatistics of the data set, pairwise scatter plots forY,x1, x2andx3, the best fittedmodel, residual analysis for the best model, and R codes.2.(10 marks) A psychologist studied the nature of the relation, if any, between an

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