Q198 · Practice questionTechnology-activeComplex familiar5 marks
QUESTION 198 (5 marks)
A dominance matrix in order A,B,C,D is
A score is the row sum of .
a)[2 marks]
Determine and interpret the A,D entry of M squared.
b)[3 marks]
Calculate all four scores and rank the teams.
WORKED SOLUTION
5 marksPractice marking scheme
ANSWER
(a) ; routes through B and C. (b) ; A,B,D,C.
Worked solution
(a) The entry is . B and C each contribute one route: A-B-D and A-C-D.
(b) Direct row sums are (2,2,1,1). Multiplying M by this column gives second-order sums (3,2,1,2). Adding yields (5,4,2,3), ranked A,B,D,C. The rule distinguishes C and D despite equal direct-win counts.
Equivalent mathematically justified methods accepted.
Exact answers unless a decimal accuracy is specified.
Part a: Calculate the entry 2.
Part a: Identify both intermediate teams.
Part b: Compute direct and second-order row sums.
Part b: Give all four scores.
Part b: Give the complete ranking.
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