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We have the following rank-related tags:

• mann-whitney-u-test (271) -- ranksum test
• wilcoxon (297) -- used for ranksum and for signed-rank
• signed-rank-test (37)
• sign-test (21)
• spearman (134)
• spearman-rho (107)
• kendall-tau (74)
• rank-correlation (101) -- most questions seem to be about Spearman's rho
• ranking (357)
• ranks (70)

Problems:

1. [wilcoxon] is ambiguous. Worse, one meaning of [wilcoxon] is synonymous with [mann-whitney-u-test] and another meaning is synonymous with [signed-rank-test].
2. [spearman] and [spearman-rho] are synonymous.
3. [rank-correlation] might be better off sorted out into specific types.
4. [ranking] and [ranks] have somewhat unclear scope.

My current proposal is:

1. Create [wilcoxon-rank-sum] and [wilcoxon-signed-rank] tags. Done.

2. Make [wilcoxon-rank-sum] and [mann-whitney-u-test] both synonyms of [wilcoxon-mann-whitney]. Done by @Glen_b.

3. Make [wilcoxon-signed-rank] the synonym of [signed-rank-test]. Done by @Glen_b. Later reverted by @Scortchi: [wilcoxon-signed-rank] appointed to be the parent, [signed-rank-test] to be its synonym.

4. Go through all [wilcoxon] questions and move those about rank sum into [wilcoxon-mann-whitney].

5. Move all the remaining threads from [wilcoxon] into [signed-rank-test] via mod merge hammer.
   

6. Merge [spearman] into [spearman-rho].
    Synonym created via voting. Merge done by @Glen_b.
    

7. Sort as many questions as possible from [rank-correlation] into [spearman-rho] and/or [kendall-tau] and/or [goodman-kruskal-gamma]. It looks like there will be ~30 questions left though. Done. Thanks @mdewey.

8. Go through [ranking] and [ranks] and try to understand what to do with them. I leave this open for now because this involves 400+ threads.

We have the following rank-related tags:

• mann-whitney-u-test (271) -- ranksum test
• wilcoxon (297) -- used for ranksum and for signed-rank
• signed-rank-test (37)
• sign-test (21)
• spearman (134)
• spearman-rho (107)
• kendall-tau (74)
• rank-correlation (101) -- most questions seem to be about Spearman's rho
• ranking (357)
• ranks (70)

Problems:

1. [wilcoxon] is ambiguous. Worse, one meaning of [wilcoxon] is synonymous with [mann-whitney-u-test] and another meaning is synonymous with [signed-rank-test].
2. [spearman] and [spearman-rho] are synonymous.
3. [rank-correlation] might be better off sorted out into specific types.
4. [ranking] and [ranks] have somewhat unclear scope.

My current proposal is:

1. Create [wilcoxon-rank-sum] and [wilcoxon-signed-rank] tags. Done.

2. Make [wilcoxon-rank-sum] and [mann-whitney-u-test] both synonyms of [wilcoxon-mann-whitney]. Done by @Glen_b.

3. Make [wilcoxon-signed-rank] the synonym of [signed-rank-test]. Done by @Glen_b. Later reverted by @Scortchi, following @ttnphns' answer.

4. Go through all [wilcoxon] questions and move those about rank sum into [wilcoxon-mann-whitney]. Done by @mdewey.

5. Move all the remaining threads from [wilcoxon] into [signed-rank-test] via mod merge hammer. Done by @Glen_b.

6. Merge [spearman] into [spearman-rho].  Synonym created via voting. Merge done by @Glen_b.

7. Sort as many questions as possible from [rank-correlation] into [spearman-rho] and/or [kendall-tau] and/or [goodman-kruskal-gamma]. It looks like there will be ~30 questions left though. Done. Thanks @mdewey.

8. Go through [ranking] and [ranks] and try to understand what to do with them. I leave this open for now because this involves 400+ threads.

Our rank-related tags are an enormous mess.

We have:

• mann-whitney-u-test (271) -- ranksum test
• wilcoxon (297) -- used for ranksum and for signed-rank
• signed-rank-test (37)
• sign-test (21)
• spearman (134)
• spearman-rho (107)
• kendall-tau (74)
• rank-correlation (101) -- most questions seem to be about Spearman's rho
• ranking (357)
• ranks (70)

Problems:

1. [wilcoxon] is ambiguous. Worse, one meaning of [wilcoxon] is synonymous with [mann-whitney-u-test] and another meaning is synonymous with [signed-rank-test].
2. [spearman] and [spearman-rho] are synonymous.
3. [rank-correlation] might be better off sorted out into specific types.
4. [ranking] and [ranks] have somewhat unclear scope.

My current proposal is:

1. Create [wilcoxon-rank-sum] and [wilcoxon-signed-rank] tags. Done.

2. Make [wilcoxon-rank-sum] and [mann-whitney-u-test] both synonyms of [wilcoxon-mann-whitney]. Done by @Glen_b.

3. Make [wilcoxon-signed-rank] the synonym of [signed-rank-test]. Done by @Glen_b. Later reverted by @Scortchi: [wilcoxon-signed-rank] appointed to be the parent, [signed-rank-test] to be its synonym.

4. Go through all [wilcoxon] questions and move those about rank sum into [wilcoxon-mann-whitney].

5. Move all the remaining threads from [wilcoxon] into [signed-rank-test] via mod merge hammer.
   

6. Merge [spearman] into [spearman-rho].
   Synonym created via voting. Merge done by @Glen_b.
   

7. Sort as many questions as possible from [rank-correlation] into [spearman-rho] and/or [kendall-tau] and/or [goodman-kruskal-gamma]. It looks like there will be ~30 questions left though.
   

8. Go through [ranking] and [ranks] and try to understand what to do with them. I leave this open for now because this involves 400+ threads.

We have the following rank-related tags:

• mann-whitney-u-test (271) -- ranksum test
• wilcoxon (297) -- used for ranksum and for signed-rank
• signed-rank-test (37)
• sign-test (21)
• spearman (134)
• spearman-rho (107)
• kendall-tau (74)
• rank-correlation (101) -- most questions seem to be about Spearman's rho
• ranking (357)
• ranks (70)

Problems:

1. [wilcoxon] is ambiguous. Worse, one meaning of [wilcoxon] is synonymous with [mann-whitney-u-test] and another meaning is synonymous with [signed-rank-test].
2. [spearman] and [spearman-rho] are synonymous.
3. [rank-correlation] might be better off sorted out into specific types.
4. [ranking] and [ranks] have somewhat unclear scope.

My current proposal is:

1. Create [wilcoxon-rank-sum] and [wilcoxon-signed-rank] tags. Done.

2. Make [wilcoxon-rank-sum] and [mann-whitney-u-test] both synonyms of [wilcoxon-mann-whitney]. Done by @Glen_b.

3. Make [wilcoxon-signed-rank] the synonym of [signed-rank-test]. Done by @Glen_b. Later reverted by @Scortchi: [wilcoxon-signed-rank] appointed to be the parent, [signed-rank-test] to be its synonym.

4. Go through all [wilcoxon] questions and move those about rank sum into [wilcoxon-mann-whitney].

5. Move all the remaining threads from [wilcoxon] into [signed-rank-test] via mod merge hammer.
   

6. Merge [spearman] into [spearman-rho].
   Synonym created via voting. Merge done by @Glen_b.
   

7. Sort as many questions as possible from [rank-correlation] into [spearman-rho] and/or [kendall-tau] and/or [goodman-kruskal-gamma]. It looks like there will be ~30 questions left though. Done. Thanks @mdewey.

8. Go through [ranking] and [ranks] and try to understand what to do with them. I leave this open for now because this involves 400+ threads.

Our rank-related tags are an enormous mess.

We have:

• mann-whitney-u-test (271) -- ranksum test
• wilcoxon (297) -- used for ranksum and for signed-rank
• signed-rank-test (37)
• sign-test (21)
• spearman (134)
• spearman-rho (107)
• kendall-tau (74)
• rank-correlation (101) -- most questions seem to be about Spearman's rho
• ranking (357)
• ranks (70)

Problems:

1. [wilcoxon] is ambiguous. Worse, one meaning of [wilcoxon] is synonymous with [mann-whitney-u-test] and another meaning is synonymous with [signed-rank-test].
2. [spearman] and [spearman-rho] are synonymous.
3. [rank-correlation] might be better off sorted out into specific types.
4. [ranking] and [ranks] have somewhat unclear scope.

My current proposal is:

1. Create [wilcoxon-rank-sum] and [wilcoxon-signed-rank] tags. Done.

2. Make [wilcoxon-rank-sum] and [mann-whitney-u-test] both synonyms of [wilcoxon-mann-whitney]. Done by @Glen_b.

3. Make [wilcoxon-signed-rank] the synonym of [signed-rank-test]. Done by @Glen_b.

4. Go through all [wilcoxon] questions and move those about rank sum into [wilcoxon-mann-whitney].

5. Move all the remaining threads from [wilcoxon] into [signed-rank-test] via mod merge hammer.
   

6. Merge [spearman] into [spearman-rho].
   Synonym created via voting. Merge done by @Glen_b.
   

7. Sort as many questions as possible from [rank-correlation] into [spearman-rho] and/or [kendall-tau] and/or [goodman-kruskal-gamma]. It looks like there will be ~30 questions left though.
   

8. Go through [ranking] and [ranks] and try to understand what to do with them. I leave this open for now because this involves 400+ threads.

Our rank-related tags are an enormous mess.

We have:

• mann-whitney-u-test (271) -- ranksum test
• wilcoxon (297) -- used for ranksum and for signed-rank
• signed-rank-test (37)
• sign-test (21)
• spearman (134)
• spearman-rho (107)
• kendall-tau (74)
• rank-correlation (101) -- most questions seem to be about Spearman's rho
• ranking (357)
• ranks (70)

Problems:

1. [wilcoxon] is ambiguous. Worse, one meaning of [wilcoxon] is synonymous with [mann-whitney-u-test] and another meaning is synonymous with [signed-rank-test].
2. [spearman] and [spearman-rho] are synonymous.
3. [rank-correlation] might be better off sorted out into specific types.
4. [ranking] and [ranks] have somewhat unclear scope.

My current proposal is:

1. Create [wilcoxon-rank-sum] and [wilcoxon-signed-rank] tags. Done.

2. Make [wilcoxon-rank-sum] and [mann-whitney-u-test] both synonyms of [wilcoxon-mann-whitney]. Done by @Glen_b.

3. Make [wilcoxon-signed-rank] the synonym of [signed-rank-test]. Done by @Glen_b. Later reverted by @Scortchi: [wilcoxon-signed-rank] appointed to be the parent, [signed-rank-test] to be its synonym.

4. Go through all [wilcoxon] questions and move those about rank sum into [wilcoxon-mann-whitney].

5. Move all the remaining threads from [wilcoxon] into [signed-rank-test] via mod merge hammer.
   

6. Merge [spearman] into [spearman-rho].
   Synonym created via voting. Merge done by @Glen_b.
   

7. Sort as many questions as possible from [rank-correlation] into [spearman-rho] and/or [kendall-tau] and/or [goodman-kruskal-gamma]. It looks like there will be ~30 questions left though.
   

8. Go through [ranking] and [ranks] and try to understand what to do with them. I leave this open for now because this involves 400+ threads.