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Created on 2019-02-24 03:39 by steven.daprano, last changed 2022-04-11 14:59 by admin. This issue is now closed.
| Messages (5) | |||
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| msg336424 - (view) | Author: Steven D'Aprano (steven.daprano) *  |
Date: 2019-02-24 03:39 | |
The documentation isn't clear as to the difference between mu and xbar, and why one is used in variance and the other in pvariance. See #36018 for discussion. For the record: mu or μ is the population parameter, i.e. the mean of the entire population, if you could average every individual. xbar or x̅ is the mean of a sample. |
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| msg336434 - (view) | Author: Davin Potts (davin) * |
Date: 2019-02-24 05:30 | |
Without necessarily defining what each means, perhaps it is sufficient to change this clause in the docs:
it should be the mean of data
For pvariance() it could read as:
it should be the *population* mean of data
And for variance() it could read as:
it should be the *sample* mean of data
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| msg336438 - (view) | Author: Raymond Hettinger (rhettinger) * |
Date: 2019-02-24 06:08 | |
> Without necessarily defining what each means, > perhaps it is sufficient to change this clause in the docs +1 That is a simple way to address the concern. |
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| msg336447 - (view) | Author: Steven D'Aprano (steven.daprano) * |
Date: 2019-02-24 08:05 | |
I'm happy with that doc change. If nobody objects, this might make an easy "Good first issue" for the upcoming sprint. Assigning to Cheryl to stop anyone else grabbing it. |
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| msg336463 - (view) | Author: Cheryl Sabella (cheryl.sabella) * |
Date: 2019-02-24 11:27 | |
Great! Thank you, Steven. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:11 | admin | set | github: 80280 |
| 2021-08-20 10:12:22 | iritkatriel | set | status: open -> closed superseder: clarify meaning of xbar and mu in pvariance/variance of statistics module resolution: duplicate stage: resolved |
| 2019-02-24 11:27:48 | cheryl.sabella | set | messages: + msg336463 |
| 2019-02-24 08:05:25 | steven.daprano | set | assignee: docs@python -> cheryl.sabella messages: + msg336447 nosy: + cheryl.sabella |
| 2019-02-24 06:08:30 | rhettinger | set | nosy:
+ rhettinger messages: + msg336438 |
| 2019-02-24 05:30:53 | davin | set | nosy:
+ davin messages: + msg336434 |
| 2019-02-24 03:39:59 | steven.daprano | create | |