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Unformatted text preview: STAT 231 Spring 2009 - Assignment 1 This assignment is out of 33 marks, each mark is denoted by  in the following mark scheme. Please mark in RED INK and give a brief indication to the student of why you have taken off marks when you do. The solutions are in BOLD, everything else was on the question sheet. Please put your initials on top of each solution you mark so that we can trace back if the student has questions. 1. [0.5 marks for each part] In the sentences below, fill in the blanks using either terminology from the course or information from the description of the study and the plots in Figure ?? . (a) The median age of smokers in the sample is higher OR greater OR more than the non-smokers (b) The Plan is observational since no variates were manipulated. . The problem men- tioned does not have a predictive aspect because it concerns an attribute in the study population, namely the proportion of smokers. (c) The variate Smoker is a binary categorical data-type which has been coded to be 0 or 1 (d) From Fig. ?? (c) we see that there is a positive association OR relationship between age and log-salary. This could be quantified by theage and log-salary....
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This note was uploaded on 08/09/2009 for the course STAT 231 taught by Professor Cantremember during the Spring '08 term at Waterloo.
- Spring '08