Identification of the Wine: The judges's overall ranking:
Wine A is Stag's Leap 1973 ........ 1st place
Wine B is Mouton 1970 ........ 3rd place
Wine C is Montrose 1970 ........ 2nd place
Wine D is Haut Brion 1970 ........ 4th place
Wine E is Ridge Mt.Bello 1971 ........ 5th place
Wine F is Leoville-las-Cas 1971 ........ 7th place
Wine G is Heitz Marthas 1970 ........ 6th place
Wine H is Clos du Val 1972 ........ 10th place
Wine I is Mayacamas 1971 ........ 9th place
Wine J is Freemark Abbey 1969 ........ 8th place
The Judges's Grades
Judge Wine -> A B C D E F G H I J
Pierre Brejoux 14.0 16.0 12.0 17.0 13.0 10.0 12.0 14.0 5.0 7.0
A. D. Villaine 15.0 14.0 16.0 15.0 9.0 10.0 7.0 5.0 12.0 7.0
Michel Dovaz 10.0 15.0 11.0 12.0 12.0 10.0 11.5 11.0 8.0 15.0
Pat. Gallagher 14.0 15.0 14.0 12.0 16.0 14.0 17.0 13.0 9.0 15.0
Odette Kahn 15.0 12.0 12.0 12.0 7.0 12.0 2.0 2.0 13.0 5.0
Ch. Millau 16.0 16.0 17.0 13.5 7.0 11.0 8.0 9.0 9.5 9.0
Raymond Oliver 14.0 12.0 14.0 10.0 12.0 12.0 10.0 10.0 14.0 8.0
Steven Spurrier 14.0 14.0 14.0 8.0 14.0 12.0 13.0 11.0 9.0 13.0
Pierre Tari 13.0 11.0 14.0 14.0 17.0 12.0 15.0 13.0 12.0 14.0
Ch. Vanneque 16.5 16.0 11.0 17.0 15.5 8.0 10.0 16.5 3.0 6.0
J.C. Vrinat 14.0 14.0 15.0 15.0 11.0 12.0 9.0 7.0 13.0 7.0
The Judges's Rankings
Judge Wine -> A B C D E F G H I J
Pierre Brejoux 3.5 2.0 6.5 1.0 5.0 8.0 6.5 3.5 10.0 9.0
A. D. Villaine 2.5 4.0 1.0 2.5 7.0 6.0 8.5 10.0 5.0 8.5
Michel Dovaz 8.5 1.5 6.5 3.5 3.5 8.5 5.0 6.5 10.0 1.5
Pat. Gallagher 6.0 3.5 6.0 9.0 2.0 6.0 1.0 8.0 10.0 3.5
Odette Kahn 1.0 4.5 4.5 4.5 7.0 4.5 9.5 9.5 2.0 8.0
Ch. Millau 2.5 2.5 1.0 4.0 10.0 5.0 9.0 7.5 6.0 7.5
Raymond Oliver 2.0 5.0 2.0 8.0 5.0 5.0 8.0 8.0 2.0 10.0
Stev. Spurrier 2.5 2.5 2.5 10.0 2.5 7.0 5.5 8.0 9.0 5.5
Pierre Tari 6.5 10.0 4.0 4.0 1.0 8.5 2.0 6.5 8.5 4.0
Ch. Vanneque 2.5 4.0 6.0 1.0 5.0 8.0 7.0 2.5 10.0 9.0
J.C. Vrinat 3.5 3.5 1.5 1.5 7.0 6.0 8.0 9.5 5.0 9.5
Group Ranking -> 1 3 2 4 5 7 6 10 9 8
Votes Against -> 41.0 43.0 41.5 49.0 55.0 72.5 70.0 79.5 77.5 76.0
(11 is the best possible, 110 is the worst)
Here is a measure of the correlation in the preferences of the judges which ranges between 1.0 (perfect correlation) and 0.0 (no correlation: W = 0.2417 The probability that random chance could be responsible for this correlation is quite small, 0.0059. Most analysts would say that unless this probability is less than 0.1, the judges preferences are not strongly related.
We now analyze how each tasters' preferences are correlated with the group preference. A correlation of 1.0 means that the taster''s preferences are a perfect predictor of the group''s preferences. A 0.0 means no correlation, while a -1.0 means that the taster has the reverse ranking of the group.
Correlation Between the Ranks of Each Person With the Average Ranking of Others
Name of Person Correlation
A. D. Villaine 0.6951
J.C. Vrinat 0.6534
Ch. Millau 0.6104
Steven Spurrier 0.4688
Pierre Brejoux 0.4634
Ch. Vanneque 0.4195
Odette Kahn 0.2926
Raymond Oliver 0.2455
Michel Dovaz -0.0675
Pat. Gallagher -0.0862
Pierre Tari -0.1543
We now compute for each wine the mean (average) grade it received from the judges and the standard deviation of those grades. If there are 3 judges and their grades are denoted by x1, x2, x3, the mean = (x1+x2+x3)/3. The standard deviation is a measure of "dispersion" around the mean and is calculated as the squareroot of
2 2 2
[(x1-mean) + (x2-mean) + (x3-mean) ]/3.
Summary Grade Statistics for Wines
A B C D E F G H I J
Mean 14.14 14.09 13.64 13.23 12.14 11.18 10.41 10.14 9.77 9.64
StdDev 1.62 1.68 1.87 2.66 3.28 1.53 3.88 4.01 3.33 3.65
We now compute the mean and the standard deviation for each judge, from which you can see which judge is harsh and which is lenient, which thinks that the wines are very different and which thinks they are pretty much the same.
Summary Grade Statistics for Judges
Name Mean Std.Dev.
Pierre Brejoux 12.00 3.58
A. D. Villaine 11.00 3.74
Michel Dovaz 11.55 2.05
Pat. Gallagher 13.90 2.12
Odette Kahn 9.20 4.53
Ch. Millau 11.60 3.52
Raymond Oliver 11.60 1.96
Steven Spurrier 12.20 2.09
Pierre Tari 13.50 1.63
Ch. Vanneque 11.95 4.81
J.C. Vrinat 11.70 2.93
The wines were preferred by the judges in the following order. When the preferences of the judges are strong enough to permit meaningful differentiation among the wines, they are separated by ------------------- and are judged to be significantly different.
1. ........ 1st place Wine A is Stag's Leap 1973
2. ........ 2nd place Wine C is Montrose 1970 ---------------------------------------------------
3. ........ 3rd place Wine B is Mouton 1970
4. ........ 4th place Wine D is Haut Brion 1970
5. ........ 5th place Wine E is Ridge Mt.Bello 1971
6. ........ 6th place Wine G is Heitz Marthas 1970
7. ........ 7th place Wine F is Leoville-las-Cases 1971
8. ........ 8th place Wine J is Freemark Abbey 1969
9. ........ 9th place Wine I is Mayacamas 1971 ---------------------------------------------------
10. ........10th place Wine H is Clos du Val 1972
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