WINETASTER ON 01/04/16 WITH 8 JUDGES AND 8 WINES BASED ON RANKS, IDENT=N Copyright (c) 1995-2016 Richard E. Quandt, V. 1.65
FLIGHT 1: Number of Judges = 8 Number of Wines = 8
Identification of the Wine: The judges' overall ranking:
Wine A is Opus One 1985 ........ 7th place Wine B is Opus One 2004 tied for 3rd place Wine C is Opus One 1996 ........ 1st place Wine D is Overture tied for 3rd place Wine E is Opus One 2011 ........ 2nd place Wine F is Opus One 1994 ........ 5th place Wine G is Opus One 2010 ........ 6th place Wine H is Opus One 1980 ........ 8th place
The Judges's Rankings
Judge Wine -> A B C D E F G H Ed 2. 3. 1. 7. 6. 5. 4. 8. Mike 3. 7. 2. 1. 4. 8. 5. 6. Alexa 6. 5. 1. 3. 2. 4. 7. 8. Burt 8. 6. 1. 3. 2. 4. 5. 7. Zaki 8. 4. 6. 5. 1. 3. 2. 7. Bob 6. 2. 1. 5. 3. 4. 7. 8. Alan 6. 3. 7. 1. 4. 2. 5. 8. Dick 4. 3. 5. 8. 7. 6. 2. 1.
Table of Votes Against Wine -> A B C D E F G H
Group Ranking -> 7 3 1 3 2 5 6 8 Votes Against -> 43 33 24 33 29 36 37 53
( 8 is the best possible, 64 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 = 0.2046
The probability that random chance could be responsible for this correlation is rather large, 0.1198. 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 taster's 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. This is measured by the correlation R.
Correlation Between the Ranks of Each Person With the Average Ranking of Others
Name of Person Correlation R Alexa 0.7904 Burt 0.7832 Bob 0.6667 Zaki 0.2651 Ed 0.2036 Alan 0.1677 Mike 0.0719 Dick -0.7306
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 C is Opus One 1996 --------------------------------------------------- 2. ........ 2nd place Wine E is Opus One 2011 3. tied for 3rd place Wine B is Opus One 2004 4. tied for 3rd place Wine D is Overture 5. ........ 5th place Wine F is Opus One 1994 6. ........ 6th place Wine G is Opus One 2010 7. ........ 7th place Wine A is Opus One 1985 --------------------------------------------------- 8. ........ 8th place Wine H is Opus One 1980 We now test whether the ranksums AS A WHOLE provide a significant ordering. The Friedman Chi-square value is 11.4583. The probability that this could happen by chance is 0.1198 We now undertake a more detailed examination of the pair-wise rank correla- tions that exist between pairs of judges. First, we present a table in which you can find the correlation for any pair of judges, by finding one of the names in the left hand margin and the other name on top of a column. A second table arranges these correlations in descending order and marks which is significantly positive significantly negative, or not significant. This may allow you to find clusters of judges whose rankings were particularly similar or particularly dissimilar. Pairwise Rank Correlations Correlations must exceed in absolute value 0.74 for significance at the 0.05 level and must exceed 0.64 for significance at the 0.1 level Ed Mike Alexa Ed 1.000 0.143 0.262 Mike 0.143 1.000 0.452 Alexa 0.262 0.452 1.000 Burt 0.048 0.381 0.881 Zaki -0.190 -0.310 0.262 Bob 0.524 0.095 0.833 Alan -0.214 -0.071 0.333 Dick 0.095 -0.452 -0.810 Burt Zaki Bob Ed 0.048 -0.190 0.524 Mike 0.381 -0.310 0.095 Alexa 0.881 0.262 0.833 Burt 1.000 0.476 0.643 Zaki 0.476 1.000 0.238 Bob 0.643 0.238 1.000 Alan 0.262 0.500 0.262 Dick -0.667 -0.286 -0.476 Alan Dick Ed -0.214 0.095 Mike -0.071 -0.452 Alexa 0.333 -0.810 Burt 0.262 -0.667 Zaki 0.500 -0.286 Bob 0.262 -0.476 Alan 1.000 -0.667 Dick -0.667 1.000 Pairwise correlations in descending order 0.881 Alexa and Burt Significantly positive 0.833 Alexa and Bob Significantly positive 0.643 Burt and Bob Not significant 0.524 Ed and Bob Not significant 0.500 Zaki and Alan Not significant 0.476 Burt and Zaki Not significant 0.452 Mike and Alexa Not significant 0.381 Mike and Burt Not significant 0.333 Alexa and Alan Not significant 0.262 Alexa and Zaki Not significant 0.262 Ed and Alexa Not significant 0.262 Burt and Alan Not significant 0.262 Bob and Alan Not significant 0.238 Zaki and Bob Not significant 0.143 Ed and Mike Not significant 0.095 Mike and Bob Not significant 0.095 Ed and Dick Not significant 0.048 Ed and Burt Not significant -0.071 Mike and Alan Not significant -0.190 Ed and Zaki Not significant -0.214 Ed and Alan Not significant -0.286 Zaki and Dick Not significant -0.310 Mike and Zaki Not significant -0.452 Mike and Dick Not significant -0.476 Bob and Dick Not significant -0.667 Burt and Dick Significantly negative -0.667 Alan and Dick Significantly negative -0.810 Alexa and Dick Significantly negative
COMMENT: Overall, these wines display a very consistent house style of classic cabernet blend wines from Napa. They were all delicious and they all displayed a density of color that was opaque and therefore misleading for the older wines. It is extraordinary that the blend wine, Overture, is as good as it is since it is only half the price of the others. It was striking and a compliment of this outstanding producer that they have maintained a consistency of style for more than a generation. It is interesting that the number 1 and the number 2 demonstrate this point of consistency However, the two oldest wines were the lowest ranked wines in the group. On revisiting the older wines, which had been decanted, at the end of the tasting, some of us felt that they had further developed in that glass and have become more appealing. The Overture is the revelation. If anyone is interested in trying (a baby Opus) they should seek out the Overture which is non-vintage.
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