C291MT2013_Solutions

# C291MT2013_Solutions - Sauder School of Business COMMERCE...

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Sauder School of Business COMMERCE 291 Midterm Exam, March 6, 2013 - SOLUTIONS Question 1 (10 marks) a) [2 marks] Years of Employment, Teaching Rating b) [1 mark] B. Percentage of Canadian adults who work full-time c) [1 mark] D. Weekly receipts at a clothing boutique d) [4 mark] 2,1,3,4. Stratified, Simple, Cluster, Systematic e) [2 marks] 5,3,4,1,2. Population = All toys produced; Sample = 100 toys; Sampling Frame = 5,000 toys; Parameter = 3%; Statistic = 5% Question 2 (6 marks) A. 43% (150/350) d) [1 mark] A. 63% (196/309) e) [2 marks] B. It appears that cell phone brand preference and gender are not independent. Question 3 (14 marks) a) [1 mark] C. All of the numbers in the set are equal b) (i)[1 mark] C. Skewed to the left. (Reason: The median is closer to Q3 than to Q1) (ii) [1 mark] 11.6 (Reason: Q3 – Q1) (iii) [2 marks] Lower inner fence = 20.24 (Reason: 37.64 – 1.5×11.6) Upper inner fence = 66.64 (Reason: 49.24 + 1.5×11.6) (iv) [1 mark] B. Yes, only on the right side of the distribution (Reason: Max > 66.64) (v) [4 marks] Decrease, Stay the same, Increase, Stay the same c) [1 mark] D.

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