Outliers by Helen Hailin Zhao

A Chinese diving judge was considered unfair because he gave Chinese divers 1.48 points on average higher than non-Chinese divers, is he a biased judge? How would you test whether the person is biased or not?

hhzhao — 2024-09-10 10:26:42 UTC

hhzhao — 2024-09-10 10:27:09 UTC

No

3036343484 — 2024-09-10 11:01:20 UTC

You need to consider other judges because maybe actually Chinese divers did better than non-Chinese divers. So every judge may score them higher.

3036343525 — 2024-09-10 11:01:33 UTC

No, he is not a biased judge.

Because the Chinese divers are really good at this sport.

Nope

3036348848 — 2024-09-10 11:01:34 UTC

Because the discrepancy has rationality. It is possible that the Chinese divers did perform better and therefore scored higher.

3036342301 — 2024-09-10 11:01:46 UTC

He is not a biased judge because Chinese athletes usually perform better than non-Chinese athletes in diving.

3036341852 — 2024-09-10 11:01:57 UTC

You can’t regard him as a biased judge according to the difference between Chinese and non Chinese. It is fair to compare between his score and other judge’s score against the same diver(Chinese and non-Chinese)

2024-09-10 11:01:59 UTC

there is a possibility that chinese divers performs better than other countries’ divers. we can compare different judges on their scores provided to the same divers

3036342210 — 2024-09-10 11:02:18 UTC

It is essential to figure out whether the majority of Chinese divers’ points are around 1.5 higher than non-Chinese divers, before making a judgement.

No

3036340652 — 2024-09-10 11:02:38 UTC

I don’t think he is biased because it is highly probable that Chinese divers excel the others. To test if he is biased, a feasible solution is to let other referees to judge the Chinese divers and see whether they also give higher points.

3036343927 — 2024-09-10 11:02:42 UTC

We need to see if the judges from other countries also consistently give higher scores to Chinese athletes. If judges from other countries also believe that Chinese athletes deserve high scores, then the Chinese judge did not make a biased judgement.

No

3036341711 — 2024-09-10 11:02:45 UTC

he is not a biased judge. Because the divers' performance should be taken into account.

3036344189 — 2024-09-10 11:02:48 UTC

We couldn't tell whether the judge is biased without further information. It could be possible that Chinese divers generally perform better than those of other countries.

3036340494 — 2024-09-10 11:02:52 UTC

If other referees have a similar difference in scores between Chinese and non-Chinese players, then he is not partial

No

2024-09-10 11:03:04 UTC

He is not a biased judge,because maybe Chinese divers perform better than non Chinese.

3036341450 — 2024-09-10 11:03:07 UTC

I would see his judge history that if he gives higher scores to all athletes on average compared to other judges, regardless of athletes' nationalities. This can see whether he just gives higher points in general or just to Chinese in particular.

3035638973 — 2024-09-10 11:03:12 UTC

there is a possibility that chinese divers performs better than other countries’ divers. we can compare different judges on their scores provided to the same divers

3036342557 — 2024-09-10 11:03:14 UTC

Perhaps it is possible to observe whether the referee's scoring pattern changes over time. Another way is to let other independent referees score the same diving action and compare the scores of the two.

2024-09-10 11:03:18 UTC

The average points of Chinese divers may be higher than the encounters.

We can get the average points of Chinese divers graded by other diving judges and compare these points.

2024-09-10 11:03:19 UTC

whether is a biased judge should consider other factors. Maybe Chinese divers performance did better than other countries

3036341199 — 2024-09-10 11:03:20 UTC

To test whether the judge is biased, we can take a look for the difficulty of postures of each divers.

3036342753 — 2024-09-10 11:03:25 UTC

no！Compare the scores given by Chinese diving judges with those given by diving judges in other countries

no

3036342507 — 2024-09-10 11:03:26 UTC

The scores given by this judge can be compared with the scores given by other judges for the same athlete, in order to determine whether the judge has a bias.

3036340406 — 2024-09-10 11:03:28 UTC

this view assumes that all the other judges are not scoring 1.48 or higher on chinese divers than non-Chinese divers, only the Chinese judge does. So other judges' scoring data need to be provided to compare.

It depends.

3036343551 — 2024-09-10 11:03:29 UTC

Not sufficient. If the Chinese divers' score were 1.48 points higher than the other divers on average, then this judge was not a biased judge. If the Chinese divers' score got the points much less than 1.48 points above the others, then this judge was probably a biased judge.

No because Chinese diving team indeed always do a better job than other times. He's a bias only when Chinese divers don't do well but this judge still gives a really high score.

3036340949 — 2024-09-10 11:03:31 UTC

3036341890 — 2024-09-10 11:03:36 UTC

we can perform a hypothesis test to statistically evaluate whether the average score difference of 1.48 points is significant or could have occurred by chance.

No

3036341541 — 2024-09-10 11:03:39 UTC

It should be considered that the performance from the chinese and non-Chinese divers. Such as the degree of difficulty of the dive, and the degree of completion of these reference factors need to be considered.

3036166745 — 2024-09-10 11:03:44 UTC

Differences between the points that other judges give to Chinese players and the points other judges give to non Chinese divers.

3036348197 — 2024-09-10 11:03:44 UTC

We could compare the results of other judges who are not Chinese with this Chinese judge and see if there is any correlation or if the Chinese judge has given unusual scores to Chinese athletes

wangsihan5600 — 2024-09-10 11:03:45 UTC

I don’t think he is a biased judge. If he gives a single person in Chinese diving team an extremely high score, that is the biased judge. He just treat every athlete equally by their performance. And Chinese athletes really did better than others.

We cannot determine whether it is a biased judge, because we need more data like the average score the judge gave to Chinese divers and non-Chinese divers and so on to determine whether it is a biased judge.

3036341668 — 2024-09-10 11:03:52 UTC

3036341278 — 2024-09-10 11:03:54 UTC

1. Refer to the scores of other judges

2. Calculate the scores of Chinese athletes and foreign athletes from a technical point of view.

3036342595 — 2024-09-10 11:03:55 UTC

I don' think he is a biased judge. As we all know that diving is one of the most outstanding programs of China, and basically every year the champion belongs to China, and the champions definitely win higher scores. In that case, the total points of China is higher because of the "outliers", so the average points of Chinese athletes are higher than other countries.

3036342337 — 2024-09-10 11:03:58 UTC

It's irresponsible to say that this Chinese diving judge is a biased judge merely because he gave higher score to Chinese divers. Because China behaves super well in diving, and he was probably just giving reasonable scores because Chinese athletes did well.

No

3036341840 — 2024-09-10 11:03:58 UTC

Because maybe Chinese diver performed better than the others in the competition.

3036341371 — 2024-09-10 11:04:01 UTC

He isn’t biased because Chinese athletes did better than others. Besides, the mean trimming can prevent judges being biased

3036341412 — 2024-09-10 11:04:03 UTC

He might not be a biased judge. Because the score are all in pattern, his grading is not an outlier. So we couldn't say that he is bias.

For evidence, we might provide the mean/pattern score of the Chinese judge's grading and also the mean/ pattern score of the Chinese divers score. If these don't have a outlier, then we could consider he is not biased.

3036342715 — 2024-09-10 11:04:06 UTC

I think based on the information provided, it's not possible to give a definitive yes or no answer without conducting the statistical test. The test results would determine if the judge is biased or not.

3036441846 — 2024-09-10 11:04:06 UTC

we should consider other divers diving ability. If they perform better or worse than Chinese divers
we should consider other judge's score. Maybe they also give higher score to Chinese divers.

No

3036340810 — 2024-09-10 11:04:09 UTC

I think he is not a biased judge. You can test through different judges from different countries to give the scores and compare them or to calculate the average. This should be fair.

3637663 — 2024-09-10 11:04:09 UTC

Scores given by other non-Chinese judges can be compared with the points given by the Chinese judge. And judge if the gap on average is near to 1.48.

3036341735 — 2024-09-10 11:04:11 UTC

I don't think the Chinese judge is unfair, because it is possible that the power of Chinese team is stronger than other countries. One possible solution is to select another judge involving the same games and compare the score of this judge and the Chinese judge.

3036340705 — 2024-09-10 11:04:11 UTC

i think it‘s not a biased judge，as there maybe the possibility that the whole Chinese divers team are at a higher level.

3036342076 — 2024-09-10 11:04:14 UTC

I think if this Chinese judge gives all of the Chinese divers a higher points than others, which means that this Chinese judge is bias. If not all of the Chinese driver get a higher points, this action cannot be the evidence to identify whether bias or not.

2024-09-10 11:04:15 UTC

In some cases, there are some bias. When evaluating whether a judge is biased, researchers typically consider the difference between the scores given by a judge and the average score given by all judges. If a judge systematically gives higher or lower scores than other judges, it may indicate bias. However, this analysis requires considering various factors, including the athlete's performance, the specific circumstances of the competition, and the judge's individual scoring habits.

3036342765 — 2024-09-10 11:04:17 UTC

He is not a biased judge. it just because those Chinese athletes worth those higher point. other judges who are not from Chinese can also give higher points to Chinese athletes, even the gap is bigger than 1.48 points.

3036341280 — 2024-09-10 11:04:18 UTC

In the specific case, if a Chinese judge gives Chinese divers an average of 1.48 points higher than other athletes, this may first be seen as a phenomenon of concern. However, to determine whether this constitutes bias, we need to further analyse the scoring of athletes from other countries by this referee, as well as comparing the scores with those of other referees. If this referee's scoring of all athletes is generally high or low, then the 1.48-point difference may simply be part of his personal scoring style and not necessarily imply unfairness.

3036341826 — 2024-09-10 11:04:20 UTC

The result is uncertain because maybe Chinese athletes actually performed better than foreign athletes in this competition.
To compare different juges' score on the same round.

3036345468 — 2024-09-10 11:04:23 UTC

If the divers from a country are overall performing better than other divers, then the judge is not biased. However, if according to other judges' scores, these divers from different countries have approximately the same level of ability and scores, then the judge giving the high mark would be seen to mark differently according to nationality, then he is biased.

3036341723 — 2024-09-10 11:04:28 UTC

If most of the people in the team get higher score than people in other team, it would be

fair. If there is one special people get higher score which make the team's mean score higher than others, it may be unfair.

No

3036348109 — 2024-09-10 11:04:30 UTC

We can analyze other judges' points given to Chinese divers compared to non-Chinese divers to see if Chinese divers perform literary better than others

outlier

3036342612 — 2024-09-10 11:04:41 UTC

it depends on the context, if all of the competitors are slightly less well-performed than the Chinese athletes, then it is fair for the judge to give a higher score, and he/she is unbiased. it required people to collect the data of the pass years' performance to see the average level of score given to the well-perform candidates.

to some extent, the judge might be biased, when he provides higher scores simply because of the same ethnicity.

He’s not a biased judge

3036348020 — 2024-09-10 11:04:47 UTC

It depends on whether Chinese divers perform really well, which can be measured by getting good results from other judges and how much better they performed than other non-Chinese divers(almost the average level).

3036343537 — 2024-09-10 11:04:49 UTC

He is not a biased judge. The points of divers depend on their performance. He may give higher points to Chinese divers because they perform better than others. The points given to divers by other judges are important evidence to determine whether he is a biased judge.

3036340614 — 2024-09-10 11:04:49 UTC

we can look at the difficulty of the Chinese players and at the same time compare the scores of other judges on the Chinese players

3036342090 — 2024-09-10 11:04:50 UTC

I don't think there is enough evidence to say he is a biased judge, because case may be Chinese divers did better than non-Chinese divers. We need to collect other judges' points and divide them into two groups, and analysis it.

conniexiao14 — 2024-09-10 11:04:55 UTC

I think he is not a biased judge. People think that he is a biased judge because he gave the Chinese diver a higher score. But it doesn’t mean that he didn’t give other countries divers higher scores. So we need to compare the scores he gave to other non- Chinese divers and the Chinese divers.

He is not, and we can plot all the points given by all judges to see if the Chinese judge's points is very far apart from the flock. If the distance is in the confidence interval, then can prove he is not.

3036340951 — 2024-09-10 11:04:56 UTC

Nahhh

3036341955 — 2024-09-10 11:04:59 UTC

Considering that the full score in diving competition is 10, 1.48 points higher cannot represent that judge is actually biased. The more possible explanation is Chinese diving athletes always perform better than others. The feasible way to decide whether that judge is biased or not is compared his/her grade with other judgers’.

No.

3036341101 — 2024-09-10 11:04:59 UTC

Because the higher average points on Chinese players be of their better performance not the bias of the judge. Only if when the points he gave to Chinese divers are higher than the other countries judges’ points on Chinese can we say that his is unfair.

No

3036341424 — 2024-09-10 11:05:04 UTC

Because in fact Chinese divers always do better than non-chinese divers，we need to consider other judges's data.

No, he is not a biased judge, because it is the fact that Chinese performed better than other divers from other countries according to the real points.

3036440755 — 2024-09-10 11:05:12 UTC

Hard to conclude.

3036341058 — 2024-09-10 11:05:18 UTC

I think it may depend. If Chinese divers are excellent enough and other diving judge also gave Chinese divers higher scores on average, this conclusion that this Chinese diving judge is biased could not be made.

3036343226 — 2024-09-10 11:05:20 UTC

I think we need to see other judges’ scores given as well in order to see if this Chinese judge is biased or not.

3036341670 — 2024-09-10 11:05:22 UTC

it depends.

we need to collect the scores given by judge for both chinese and non-chinese divers to see whether this judge usually gives high scores.

3036345286 — 2024-09-10 11:05:26 UTC

It needs to collect other judges data to test whether Chinese judge is biased or not, because Chinese diving performance is usually better than other countries.

3036341979 — 2024-09-10 11:05:29 UTC

We need to compare whether diving judges from other countries also give higher scores to Chinese athletes. If so, it can only indicate that Chinese divers have a higher level of skill and Chinese judge cannot be considered biased.

He is not biased

3036348654 — 2024-09-10 11:05:29 UTC

There are some steps that can be taken to test whether the judge is biased. For example, we can analyze the judge’s background and experiences. By looking into the judge’s personal and professional background to see if there are any factors that could influence decision making.

may not

3036342832 — 2024-09-10 11:05:32 UTC

We can compare his point with the average point of the same driver. If his point is not higher than the average point of Chinese drivers, he isn’t a biased judge. We can also compare his point to “mean trimming” point or median.

3036342624 — 2024-09-10 11:05:36 UTC

No, I don't think he is a biased. We can check the difference between the average score that other judges give to Chinese athletes and the score they give to non-Chinese to figure out whether the judge give a fake high score.

2024-09-10 11:05:36 UTC

We need all the score data of diving competition he has participated in giving points. We can divide the scores with Chinese and non-Chinese and we have to see how many times he was an outlier in both teams.

3036348537 — 2024-09-10 11:05:49 UTC

No Because he didn’t give a particular person higher score and the results for Chinese divers form a pattern. It’s possible that Chinese divers are performed better than other groups.

3036347624 — 2024-09-10 11:05:49 UTC

No, this is not sufficient to draw conclusion that the Chinese judge is biased, cause we need the average points gave by judges from others countries to make a comparison. If other judges did not give Chinese much higher points than other athletes like the chinese judge, the chinese would probably biased.

3036341450 — 2024-09-10 11:05:53 UTC

3036343410 — 2024-09-10 11:05:56 UTC

It is a fact that Chinese divers usually have better diving performance than divers from other countries, and thus they deserve to get higher points. Therefore, to decide whether or not the Chinese judge is biased，it should be taken into consideration on average how much points other judges give to Chinese divers.

No

conniexiao14 — 2024-09-10 11:05:59 UTC

No

2024-09-10 11:06:00 UTC

He is not a biased judge because other non Chinese judges give Chinese athletes higher points than non-Chinese athletes in diving.

3036441846 — 2024-09-10 11:06:08 UTC

we should consider other divers diving ability. If they perform better or worse than Chinese divers

we should consider other judge's score. Maybe they also give higher score to Chinese divers.

3036342703 — 2024-09-10 11:06:22 UTC

He is probably not a biased judge, because it is wildly known the good performance of Chinese divers and perhaps the mean of Chinese divers is significantly better than diver from non-Chinese. To investigate it, it is necessary to collect grading data from other judges.

No

3036341242 — 2024-09-10 11:06:23 UTC

We can demonstrate that this judge’s scoring aligns with the scores given by other judges in similar circumstances

The judge isn't biased

3036342961 — 2024-09-10 11:06:42 UTC

I don't consider the judge is biased. First of all the judgment should be based on the real performance of the diving. It's not wise, comprehensive and arbitrary to make the assumption just because of the higher score. Chances are that China Team did better than other countries in the competition.

Perhaps yes,perhaps not

3036342442 — 2024-09-10 11:06:44 UTC

compare the average score he gave to foreign divers when there is no Chinese athletes concerned in th group with when there is any.

It requires more information to decide whether he is a biased judge. There are both likelihoods. For example, we can compare the scores he gave other non-Chinese with the scores other judges gave. If there is not obvious gap, then this Chinese diving judge could be more likely to be considered as a fair judge.

3036347856 — 2024-09-10 11:06:48 UTC

3036159493 — 2024-09-10 11:06:55 UTC

Scores from other judges can be reference to confirm whether Chinese judges are biased.

3036342167 — 2024-09-10 11:07:08 UTC

Since all of the judges are well-educated and familiar with the marking system, we can observe other countries' judges data to observe whether the judger gives the higher score it is based on his bias, or the Chinese diver's technique is better than other divers.

No

3036166745 — 2024-09-10 11:07:46 UTC

We should examine the differences between points given by the other judges to the Chinese divers and points given by the other judges to non Chinese divers.

2024-09-10 11:07:49 UTC

No

3036347777 — 2024-09-10 11:10:14 UTC

No, he is not biased. To assess if a diving judge is biased, we can perform a statistical test like a t-test to compare scores given to Chinese divers versus non-Chinese divers. If there's a significant difference, it might indicate bias.

No

dddaijxuan — 2024-09-10 11:35:25 UTC

Chinese divers may have a better performance than others, so we need to see the scores from other judges and estimate by more data.

devtools::install_github("xl0418/ggradar2",dependencies=TRUE)

3036343484 — 2024-09-10 13:08:07 UTC