HW1_MA511_Fall2016.pdf - HW#1 due M 9/12 Typed work is not...

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HW #1, due M, 9/12 Typed work is not required. Please provide concise output of your work in a Word document. Note: Go to canvas.wpi.edu to access data from the book where necessary. The data is in .txt form. To transfer this data to Excel (i) Copy Data and Labels in .txt file, (ii) Paste Special (Text) in Excel, (iii) Go to “Data” in menu on top line -> Choose Text to Columns-> Used Fixed Width option. (1) p76, 2.12 The data set FSALARY contains the 1993-1994 salaries (in $10000’s) of full-time WPI faculty members, along with their academic rank (assistant, associate, or full professor). (a) Give a stratified plot and a side-by-side boxplot for this data set. Which graphical display is more effective for presenting this data set? Why? (b) Are there any outliers? If yes, explain them. (c) Compare the salaries of assistant professors, associate professors, and full professors. (d) How might you explain the variation in the data? (2) An article explores distributions of oxygen in surface sediments. Measurements were performed and a sample of 22 depths yielded the following data in millimoles per square meter per day in diffusive oxygen uptake (DOU). (Many of these are simple questions but I feel it’s worth having experience working out such calculations once to make sure you relate to them well later on.)
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