McGill Fall 2009 - COMP251 A2 marking scheme and some statistics

Total: 35

Q1: 5 points.

Q2: 12 points.
(a) 3 points: we are looking for *exact* answer here.
(b) 7 points: 4 points for the codes and 3 points for explanation/comments that help you understand the solution.
(c) 2 points.

Q3: 13 points.
(a) 2 points: 
(b) 2 points:
(c) 5 points:
(d) 2 points:
(e) 2 points.

Q4: 5 points.
3 points for the preprocessing procedure.
2 points for showing how to answer the queries (after preprocessing)

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Column Statistics for: A2
Count: 	58
Average: 	27.2
Median: 	27.5
Maximum: 	34.5
Minimum: 	15.0
Standard Deviation: 	4.51