July 3, 2014

Super 15 Predictions for Round 18

Team Ratings for Round 18

The basic method is described on my Department home page. I have made some changes to the methodology this year, including shrinking the ratings between seasons.

Here are the team ratings prior to this week’s games, along with the ratings at the start of the season.

Current Rating Rating at Season Start Difference
Crusaders 8.02 8.80 -0.80
Waratahs 7.48 1.67 5.80
Sharks 5.65 4.57 1.10
Hurricanes 3.40 -1.44 4.80
Bulls 2.62 4.87 -2.30
Brumbies 2.13 4.12 -2.00
Stormers 1.98 4.38 -2.40
Blues 1.76 -1.92 3.70
Chiefs 1.13 4.38 -3.20
Highlanders -1.37 -4.48 3.10
Reds -3.16 0.58 -3.70
Force -4.40 -5.37 1.00
Cheetahs -4.52 0.12 -4.60
Lions -6.02 -6.93 0.90
Rebels -7.70 -6.36 -1.30

 

Performance So Far

So far there have been 106 matches played, 67 of which were correctly predicted, a success rate of 63.2%.

Here are the predictions for last week’s games.

Game Date Score Prediction Correct
1 Highlanders vs. Chiefs Jun 27 29 – 25 -0.60 FALSE
2 Rebels vs. Reds Jun 27 20 – 36 -0.10 TRUE
3 Hurricanes vs. Crusaders Jun 28 16 – 9 -3.40 FALSE
4 Waratahs vs. Brumbies Jun 28 39 – 8 4.80 TRUE
5 Force vs. Blues Jun 28 14 – 40 0.90 FALSE

 

Predictions for Round 18

Here are the predictions for Round 18. The prediction is my estimated expected points difference with a positive margin being a win to the home team, and a negative margin a win to the away team.

Game Date Winner Prediction
1 Chiefs vs. Hurricanes Jul 04 Chiefs 0.20
2 Lions vs. Rebels Jul 04 Lions 5.70
3 Crusaders vs. Blues Jul 05 Crusaders 8.80
4 Force vs. Reds Jul 05 Force 1.30
5 Stormers vs. Bulls Jul 05 Stormers 1.90
6 Cheetahs vs. Sharks Jul 05 Sharks -7.70
7 Waratahs vs. Highlanders Jul 06 Waratahs 12.90

 

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David Scott obtained a BA and PhD from the Australian National University and then commenced his university teaching career at La Trobe University in 1972. He has taught at La Trobe University, the University of Sheffield, Bond University and Colorado State University, joining the University of Auckland, based at Tamaki Campus, in mid-1995. He has been Head of Department at La Trobe University, Acting Dean and Associate Dean (Academic) at Bond University, and Associate Director of the Centre for Quality Management and Data Analysis at Bond University with responsibility for Short Courses. He was Head of the Department of Statistics in 2000, and is a past President of the New Zealand Statistical Assocation. See all posts by David Scott »