Questions tagged [exact-duplicates]

The process of identifying and closing questions that are exact duplicates of another question

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19 votes
3 answers
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What to do about obsolete, or out-of-date questions, specifically this one about neural networks?

Some questions have answers which are obsolete, or outdated. One prominent example is How to choose the number of hidden layers and nodes in a feedforward neural network? This question has an answer ...
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2 votes
1 answer
51 views

Question closed as duplicate of a totally different question

My question was closed as a duplicate of another question. I was asking for a formula, if any, to compute accuracy for a logistic regression without using a separate test set. For instance (I am just ...
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8 votes
0 answers
148 views

Two good questions (with good answers) about fitting after cross validation: to which should we point the dupes?

These two questions answer are very similar, and each has a good, highly upvoted, accepted answer: How to choose a predictive model after k-fold cross-validation?, and Training with the full dataset ...
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11 votes
1 answer
312 views

Beta regression 0/1 duplicates

I noticed that we have three threads which appear to address the exact same topic. Can someone with expertise in this area make a recommendation of which questions should be closed as a duplicate of ...
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  • 79.4k
1 vote
0 answers
56 views

If I didn't get an answer about statistics on math.stackexachange should I post duplicate on stats.stack?

I asked a question on math.stackexchange.com and I didn't receive any answer. Can I post it on stats.stackexchange? The question is from category statistics, numerics and algorithms.
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  • 482
9 votes
2 answers
57 views

Can CV bookmark index questions for which others are commonly closed as duplicates?

If you go to close a question as a duplicate, CV tries its best to "guess" which earlier question it may be duplicate of. Being statisticians, we are leery of the algorithm, and indeed matching on a ...
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  • 53.2k
11 votes
0 answers
648 views

Canonical duplicate for "Why do predictions vary less than observations?"

Two recent questions: Regression - variance of predictions much lower than variance of target, which I voted to close as a duplicate of Regression predictions show far less variance than expected I ...
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6 votes
1 answer
83 views

Modifying the title of duplicate questions

This question was recently closed as duplicate. I agree with this, but the title is now the title of the older question which is more restrictive than that of the new one (the old one is about two ...
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  • 94.7k
10 votes
2 answers
158 views

What to do with a question which is a duplicate of a question on Math SE

This question What is a distribution over functions? is a duplicate of https://math.stackexchange.com/questions/2297424/extending-a-distribution-over-samples-to-a-distribution-over-functions but I ...
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  • 16k
9 votes
0 answers
112 views

Please help again with review queues, even if they are short!

Again posts can linger for too long (days) in the review queues without resolution. Now not because the queues are long, they are short so people forgot to visit them. See my former question long ...
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5 votes
1 answer
105 views

What to do with a question which asks about R packages and how to fit RBF networks

This question How to fit a RBF network in R? asks an off-topic question (which R package to use to fit RBF networks) and a question which, while on-topic, is very likely a duplicate. Should I close ...
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  • 16k
7 votes
1 answer
153 views

Should we have a canonical question about coincidences?

Right now, this question is marked for closing as a duplicate of this one. Yet the titles and subjects are totally different at first glance - and someone searching for something similar will have ...
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  • 94.7k
7 votes
1 answer
102 views

Answer in question marked as duplicate is superior

The following question (let's call it A) Unequal sample size one way ANOVA has an accepted, upvoted answer. It is also marked as a duplicate of the newer question (B) Unequal Sample Sizes One-Way ...
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  • 12k
10 votes
2 answers
122 views

Does close-as-duplicate require an accepted answer on the target thread?

Today I've seen a specific user comment on multiple threads that the target of a close-as-duplicate is not accepted, and therefore one cannot vote to close as a duplicate with the target thread as the ...
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  • 79.4k
12 votes
1 answer
86 views

What to do when a question with an open bounty is a duplicate?

Question Basic question about standard error in predictive model is clearly a duplicate of either How to compute prediction bands for non-linear regression? or Shape of confidence and prediction ...
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  • 16k
9 votes
1 answer
159 views

What to do if we see cross-posting

This question fitting a distribution to survival curve in R has been posted as an exact duplicate on Stack Overflow https://stackoverflow.com/questions/48137772/fitting-a-distribution-to-survival-...
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  • 16k
22 votes
3 answers
767 views

What to do about "wrong" questions?

We sometimes get what I would describe as "wrong" questions. For instance, a perennial favorite seems to be questions about binning continuous variables, like What is a best way of binning non-finite ...
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5 votes
1 answer
131 views

What to do about an answer copied verbatim by another user (in an attempt to be helpful)?

I just noticed that this answer is a nearly verbatim copy of my answer to the duplicate question here (I answered before I marked the question as a dupe: I'm not sure what happened, but I might have ...
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  • 35.3k
5 votes
1 answer
346 views

If question A came before question B how can A be a duplicate of B?

The community often brings old questions back up to the front page to allow for a fresh review by the membership of these questions. Recently on Cross Validation I have seen members suggest that an ...
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12 votes
2 answers
166 views

What to do about very different questions with very similar answers?

I have noticed several times that some questions are flagged by some as "duplicate" questions when the questions appear very different but have similar answers. The questions are asking about very ...
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  • 94.7k
5 votes
0 answers
54 views

Duplicates? Where should I put my question?

I asked a question about Neural Networks in the Signal Processing site Question However now, checking the different sites I wonder if this is more on topic in Cross Validated? And second, What is ...
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2 votes
0 answers
40 views

Why can't we close questions as duplicates if they are already answered on another Stack Exchange site? [duplicate]

Background: I saw this answer: Negative population variable importance The top line says that the question is a duplicate of one on mathoverflow. I tried to close-vote it, because it is a duplicate ...
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  • 8,290
2 votes
3 answers
115 views

Proposal to merge Cohen's kappa Q/A

In accordance with our policy: What is our policy on merging duplicate questions?, that is, we are supposed to post meta suggestions for merges of questions/answers and take votes on them. I propose ...
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  • 11.9k
2 votes
1 answer
87 views

Should I ask a new question or will it be marked as duplicate?

The question Regression with percentage response variable (ratio of two counts but the counts themselves are not available) in R is very close to a duplicate of What are the issues with using ...
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  • 16k
5 votes
1 answer
146 views

My question was marked as duplicate - despite actually building on the subject it was accused of duplicating

I have a question about my Cross Validated post: The formula of a coefficient from a regression with 3 independent variables (not in matrix form) I posted the original question today and immediatelly ...
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10 votes
4 answers
269 views

Question A is a duplicate of question B + question C: what to do?

If a question A is a duplicate of a combination of two questions, what should I do? Should I flag it as duplicate of one of the two questions, and leave a comment? The issue I have with comments is ...
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11 votes
1 answer
110 views

Should I answer this question or should I add an answer to these other "similar" questions?

I was going to answer a question about books for time series. However, in comments Andre Silva pointed out this answer (which is also a Community Wiki) and this other answer. Now, the latest ...
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  • 16k
15 votes
2 answers
257 views

Should new users be allowed to provide questions similar to others?

Recently on CrossValidated I have found that new members may not have studied all the rules prior to asking their first question. I find that moderators and other users will quickly vote to close ...
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14 votes
6 answers
371 views

Project Reduplication of Deduplication - Cross Validated

Stack Exchange recently started a collaboration project with the University of Melbourne, in an attempt to improve the automatic detection of duplicate questions. More information on the project and ...
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8 votes
1 answer
139 views

Can I ask a question again, but with a different point of view?

I approached a question the wrong way and I would like to ask it again from a different point of view, but it already has an answer. I asked this question: Estimating quantiles with linear ...
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  • 16k
6 votes
1 answer
176 views

A question is a clear duplicate, but the original question doesn't have an answer - only a (real good) comment. What to do?

Question Compare the statistical significance of the difference between two polynomial regressions in R is an obvious duplicate of question Comparing difference between two polynomial regression ...
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  • 16k
11 votes
1 answer
208 views

Updating/re-asking software-related questions

In R, there are two main packages for estimating mixed effects models: nlme and lme4. They have certain differences. (There are also other packages.) In 2010, we had a well-received question: How to ...
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6 votes
1 answer
66 views

Suggestion to merge several questions on hyperparameter definition

Consider these three questions (in chronological order): What exactly is a hyperparameter? What do we mean by hyperparameters? What's in a name: hyperparameters I think it's pretty clear that ...
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  • 95k
10 votes
0 answers
231 views

How many questions about cross-validation do we honestly need?

We have a wealth of questions about cross-validation, such as Cross-validation including training, validation, and testing. Why do we need three subsets? What is the difference between test set and ...
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  • 79.4k
1 vote
1 answer
216 views

Overzealous marking as duplicate

I think it is quite obvious (so long as you read it in its entirety) that this question has incorrectly been marked as duplicate. It is worth reading the comments too. EDIT: Just to be clear, my ...
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3 votes
1 answer
130 views

How is this question a dupe?

$\mathbb{E}[S_n]$, when $S_n$ takes $X_1+...+X_n$ or $Y_1+...+Y_n$? I don't think it is the same thing as: Why does $\mathbb{E}(\frac{X_1+...+X_n}{n})=\mathbb{E}(X)$? because the former involves ...
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  • 2,176
14 votes
2 answers
219 views

Many (historical) duplicate questions - how to pick a "canonical" question?

I want to bring this up here rather than mass-flagging a whole bunch of questions as duplicates (and also avoiding the issue of choosing one as the "base") This question from today is a new member of ...
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  • 2,317
2 votes
2 answers
119 views

Asking for clarification on the benefits of redundancy or multiple questions and answers on one topic

I have discovered this site only recently, and coming from a non-mathematical or computer background, but with quite a bit of interest in statistics and scientific methodology, I've come to enjoy it ...
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7 votes
2 answers
132 views

Editing abbreviation in the title

Recently I wanted to mark a duplicate of a question about defining maximum likelihood, but was unable to find the "main" question since it used "MLE" in title rather then "maximum likelihood" (Maximum ...
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  • 115k
5 votes
1 answer
87 views

"Possible duplicate" label vs. "This question already has an answer here"

I noted that the old duplicates and the new duplicates have different formatting. The questions that are now getting closed as duplicate get a bluish plaque on top saying "This question already has ...
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  • 95k
12 votes
1 answer
12k views

I attempted to make a FAQ-style question; does it make sense?

There have been several discussions on meta about how to organize frequently asked questions, and one idea is that one can simply write and answer such a question, creating a thread that can later be ...
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  • 95k
3 votes
1 answer
201 views

Does it make a sense to create the reference questions for popular topics?

There are topics which keep coming back in different forms such as normality testing of random variables. I thought maybe it makes sense to create a question with the best possible formulation, then ...
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  • 56.6k
4 votes
1 answer
132 views

Duplicate linked to question with no answers

Today I found something strange, a question that is marked as a duplicate of another question that is closed as off-topic (while IMHO it was not off-topic, but that is a meta off-topic comment in here)...
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  • 115k
16 votes
1 answer
175 views

What is our policy on merging duplicate questions?

Sometimes a duplicate question gets an answer before it gets closed as a duplicate. In some cases this answer is either better than the answer(s) in the "main" question, or at least adds something ...
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  • 95k
7 votes
1 answer
73 views

Inconsistency with closure and migration

There were two very similar posts on CV - this and the one it (almost) duplicates (at least, if you count the Q in comments, it's a duplicate). I marked the linked one as a duplicate and was in the ...
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  • 261k
1 vote
1 answer
106 views

Accepting an answer of another/duplicate question

My question turned out to be a duplicate. Yet, it gathered some good answers. However, one of the answers to the other, first, question suits me best. Can I accept it as best answer to my question?
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14 votes
2 answers
333 views

What should be our policy on duplicate answers?

I recently came across an answer that was copied & pasted in toto from another thread. I think the answer is high-quality--I had upvoted the previous iteration--but I am uncomfortable with this; ...
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10 votes
2 answers
242 views

Do duplicates count across SE sites?

If a question asked on CV is answered on another SE site, is that a duplicate question?
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  • 94.7k
5 votes
1 answer
87 views

What makes a question a duplicate and when should it be flagged?

My question is related to this post about duplicate questions and I hope it does not seem trivial: When can I be sure that a question is in fact a duplicate? I was wondering about this when I ...
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  • 18.2k
7 votes
4 answers
649 views

Exact duplicate or not: Recent question on mathematics needed for ML

I think this question was closed incorrectly: Is a strong background in maths a total requisite for ML? This asked, "Is a strong background in maths a total requisite for ML? Should I try and fill in ...
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  • 10.4k