quiz1sol[1]

quiz1sol[1] - Statistics 231 MARK SCHEME Please mark in RED...

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Statistics 231 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. Please pay particular attention to “ﬁll in the blank” questions. Answers other than those given may be acceptable and if it makes sense you should give the mark. If in doubt ask. 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 value of Mark 1 in Section 1 is approximately 70% . (b) Since the Professors are interested in the question ‘does downloading the broadcast lecture improve the students understanding?’, this problem has a causative aspect. (c) A student in Section 1 is a unit of the study and their mark in STAT 230 is a variate . It has an ordinal data-type because it can be ordered. (d) From Fig. ?? (a) we see that there is a positive OR linear OR strong association between the variates Mark 1 and the STAT 230 mark. (e) There are

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This note was uploaded on 10/21/2010 for the course MATHEMATIC stats taught by Professor Various during the Spring '10 term at Waterloo.

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quiz1sol[1] - Statistics 231 MARK SCHEME Please mark in RED...

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