kragster
Hall of Fame
The discussion around weak and strong era really should first focus on - is it statistically possible for one era of players to be weaker or stronger than another?
Would love to carry out a simple experiment to prove/disprove a point. Please go to the site below and do this coin flipping experiment
http://www.mathsonline.co.uk/nonmembers/resource/prob/coins.html
1. Select 10 coins and 1000 trials.
2. Report back to me the number of times you got 5Hs in a row, 9 Heads in a row and 10 heads in a row
My numbers are
5 Heads:256
9 Heads:5
10 Heads:1
Once we have enough results , I would like to draw the following conclusions:
1) Let's assume the top 100 tennis players of any era have a skill/ability level (includes physical/mental skill) from 1 to 10.
2) The average competitiveness of an era is almost always the same i.e in the coin tossing experiment we SHOULD see that most folks have approximately the same number of times when they got 5 Heads. One piece of evidence to prove this is by looking into the avg ATP points for the 50th ranked player in the world every year. If you go back and look at the results you will find with remarkable consistency that these players have between 850-950 ATP ranking points. I can predict with an extremely high level of confidence that the 50th ranked player next year will have between 850-950 pts.
2) Like any distribution though, once you get to the edges, there is a lot more uncertainty. The number of times folks got 9 Heads or 10 Heads will be quite different. The tennis version of this is that it is much harder to predict the avg ATP points of the # 1 ranked player .
3) An era where a player racks up a bunch of slams could be a function of that person being a 10 and the next best players being 9's. An era where players split slams could be where the top players are all 10's or all 9's. In reality it is hard to tell which is the case. Is a competitive era because we have more than one 10 , or because we have multiple 9s. However statistically it would be much less likely that the reason an era is competitive is because it has a bunch of 10s . The coin tossing experiment should show very few people with more than one 10.
4) One benchmark we have that should be relatively stable is the one we established in point (1) that does not shift across time. And that benchmark is the average level of the era. For the most part (discounting advances in technology/health etc) the average level of an era is constant. So a top player's winning % vs the average crowd (lets say players ranked 40-60) should tell you how strong that player is. That could be one way to tell if the player is a 9 or a 10.
Of course there are numerous realities not reflected in the statistics. Player's levels change , they could be injured , the 'ability' of a player is not an absolute quantity that is independent of surface conditions. But by and large, once you account for major changes (such as Australian open becoming a slam) I think it is fair to make comparisons across eras.
Would love to carry out a simple experiment to prove/disprove a point. Please go to the site below and do this coin flipping experiment
http://www.mathsonline.co.uk/nonmembers/resource/prob/coins.html
1. Select 10 coins and 1000 trials.
2. Report back to me the number of times you got 5Hs in a row, 9 Heads in a row and 10 heads in a row
My numbers are
5 Heads:256
9 Heads:5
10 Heads:1
Once we have enough results , I would like to draw the following conclusions:
1) Let's assume the top 100 tennis players of any era have a skill/ability level (includes physical/mental skill) from 1 to 10.
2) The average competitiveness of an era is almost always the same i.e in the coin tossing experiment we SHOULD see that most folks have approximately the same number of times when they got 5 Heads. One piece of evidence to prove this is by looking into the avg ATP points for the 50th ranked player in the world every year. If you go back and look at the results you will find with remarkable consistency that these players have between 850-950 ATP ranking points. I can predict with an extremely high level of confidence that the 50th ranked player next year will have between 850-950 pts.
2) Like any distribution though, once you get to the edges, there is a lot more uncertainty. The number of times folks got 9 Heads or 10 Heads will be quite different. The tennis version of this is that it is much harder to predict the avg ATP points of the # 1 ranked player .
3) An era where a player racks up a bunch of slams could be a function of that person being a 10 and the next best players being 9's. An era where players split slams could be where the top players are all 10's or all 9's. In reality it is hard to tell which is the case. Is a competitive era because we have more than one 10 , or because we have multiple 9s. However statistically it would be much less likely that the reason an era is competitive is because it has a bunch of 10s . The coin tossing experiment should show very few people with more than one 10.
4) One benchmark we have that should be relatively stable is the one we established in point (1) that does not shift across time. And that benchmark is the average level of the era. For the most part (discounting advances in technology/health etc) the average level of an era is constant. So a top player's winning % vs the average crowd (lets say players ranked 40-60) should tell you how strong that player is. That could be one way to tell if the player is a 9 or a 10.
Of course there are numerous realities not reflected in the statistics. Player's levels change , they could be injured , the 'ability' of a player is not an absolute quantity that is independent of surface conditions. But by and large, once you account for major changes (such as Australian open becoming a slam) I think it is fair to make comparisons across eras.
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