User talk:Qniemiec

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Imponderables (book series)
This is an automated message from 173.45.72.122. I have performed a search with the contents of Imponderables (book series), and it appears to be very similar to another Wikipedia page: Imponderables. It is possible that you have accidentally duplicated contents, or made an error while creating the page&mdash; you might want to look at the pages and see if that is the case. If you are intentionally trying to rename an article, please see Help:Moving a page for instructions on how to do this without copying and pasting. If you are trying to move or copy content from one article to a different one, please see Copying within Wikipedia and be sure you have acknowledged the duplication of material in an edit summary to preserve attribution history.

It is possible that the bot is confused and found similarity where none actually exists. If that is the case, you can remove the tag from the article. 173.45.72.122 (talk) 12:46, 18 January 2011 (UTC)

Imponderables
I just finished cleaning up your cut-and-paste move of Imponderables and Imponderables (book series). Next time, if you wish to move a page, please do so via the move function built into the site rather than cutting and pasting. This preserves the page history, which is required per Wikipedia's licensing terms. If you have any questions, let me know. Thanks! SchuminWeb (Talk) 20:09, 18 January 2011 (UTC)

February 2011
Welcome to Wikipedia. We welcome and appreciate your contributions, including your edits to Square root, but we cannot accept original research. Original research also encompasses novel, unpublished syntheses of previously published material. Please be prepared to cite a reliable source for all of your information. Thank you. - DVdm (talk) 13:46, 15 February 2011 (UTC)

culturesheet.org
Hi Qniemiec, I removed your links (one as a reference, one as an External Link) to culture sheet.org, because it is an open wiki and is not remotely reliable as a Wikipedia reference/source, or as an external link. See WP:ELNO and WP:RS for information on what meets the standards for sourcing and external links here. I know you can't be expected to know all the many policies and guidelines here. There are usually good reasons for them, though. I sometimes find it helpful to understand the reasons behind the guidelines, since the principles can often be applied in other areas. Thanks for helping out and editing here, First Light (talk) 17:33, 7 August 2011 (UTC)

History of the Poles in the United States
Given your high fluency in Polish, I am reaching out to you in regards to the History of the Poles in the United States article. It has no Polish equivalent, and any time you can spend towards translating in any capacity would be much-appreciated. I would be more than happy to help any way that I can.

Thank you! Pola.mola (talk) 20:20, 19 February 2016 (UTC)

An image you uploaded
Hi, Qniemiec,

Back in December 2010, you uploaded, which appears on the page Pearson correlation coefficient. I believe that the lines are labeled wrong—the label “y=...” should be on the less steep line, and the label “x=...” should be on the steeper line. To see this, note that the slope of “y=...” is, by the standard formula, $$\frac{\sigma_{xy}}{\sigma_x^2}.$$ The coefficient of y in the regression of x on y is $$\frac{\sigma_{xy}}{\sigma_y^2}$$; but when you plot it in the graph with y on the vertical axis, the slope is the reciprocal of that, namely $$\frac{\sigma_y^2}{\sigma_{xy}}.$$ Comparing the slopes of the two lines by cross-multiplying and using $$\sigma_{xy}=\rho\cdot \sigma_x\sigma_y$$ and $$\rho^2<1$$ shows that the slope of the “y=...” line is less than the slope of the “x=...” line with y plotted vertically.

Could you redo the graph to reflect this? Thanks! Loraof (talk) 17:40, 26 December 2017 (UTC)


 * Caution: The image above is the already corrected version! --Qniemiec (talk) 23:26, 4 January 2018 (UTC)


 * Hi Loraof, are you sure? As you mentioned, the slope of the red line [ y=f(x) ] is $$\frac{\sigma_{xy}}{\sigma_x^2}.$$, as shown by the red slope triangle with Cov(x,y) as its vertical and Var(x) as its horizontal leg. And vice versa, the slope of the blue line [ x=f(y) ] would be $$\frac{\sigma_{xy}}{\sigma_y^2}$$, with Var(y) as the horizontal leg of the corresponding blue slope triangle, and Cov(x,y) as the vertical leg, if plotted against the y-axis. However, if put into a common diagram plotted against the x-axis (as shown above), positions of the blue line's parameters change, with Var(y) now becoming the vertical leg of the blue slope triangle, and Cov(x,y) the horizontal leg, i.e. this slope is $$\frac{\sigma_y^2}{\sigma_{xy}}.$$ then. So, up to this point we seem to agree, don't we? The rest is a question of how Cov(x,y) relates to Var(x) and/or Var(y): as long as the first keeps being greater than both Var(x) and Var(y), the figure will keep looking as drawn, while - if Cov(x,y) becomes less than Var(x) and/or Var(y) - the situation will change accordingly, i.e the way you proposes, with the slope of the “y=...” line being less than the slope of the “x=...” line then. So, does $$\sigma_{xy}=\rho\cdot \sigma_x\sigma_y$$ and $$\rho^2<1$$ mean that this is always the case? Greetings --Qniemiec (talk) 14:13, 4 January 2018 (UTC)


 * It’s impossible for both Cov(x,y) > Var(x) and Cov(x,y) > Var(y). First, Cov(x,y) > Var(x) means $$\rho \sigma_x\sigma_y>\sigma_x^2$$ and thus $$\rho >\frac{\sigma_x}{\sigma_y},$$ which requires $$\sigma_x<\sigma_y$$ since $$\rho <1.$$ But by parallel reasoning, Cov(x,y) > Var(y) requires $$\rho >\frac{\sigma_y}{\sigma_x},$$ which requires $$\sigma_y<\sigma_x$$ since $$\rho <1.$$ Since these contradict each other, the case shown in the graph cannot occur. Loraof (talk) 18:25, 4 January 2018 (UTC)


 * Hi, and thanks for that fast answer. So, if I understand you correctly, this means that if Cov(x,y) is > Var(x), then on the other hand Var(y) must always be > Cov(x,y), and vice versa? Respectively $$\frac{\sigma_{xy}}{\sigma_y^2} \cdot \frac{\sigma_{xy}}{\sigma_x^2} < 1$$? By consequence this would mean that either $$ \sigma_y^2 > \sigma_{xy} > \sigma_x^2$$, or $$ \sigma_x^2 > \sigma_{xy} > \sigma_y^2$$ always applied? If that's the essence of what you've tried to explain to me, I will update the figure accordingly as soon as possible. Greetings --Qniemiec (talk) 20:18, 4 January 2018 (UTC)


 * That’s right, except that we could also have $$\sigma_y^2>\sigma_x^2>\sigma_{xy}$$ or $$\sigma_x^2>\sigma_y^2>\sigma_{xy}$$ – these occur if the correlation is very low. Thanks! Loraof (talk) 20:31, 4 January 2018 (UTC)


 * The current version looks good—thanks! I would note, though, that your yellow caution above is incorrect—on my screen the red “y=...” version shows as the steeper one. But on the page Pearson correlation coefficient the new version shows. Loraof (talk) 23:47, 4 January 2018 (UTC)

Disambiguation link notification for August 15
Hi. Thank you for your recent edits. An automated process has detected that when you recently edited Sign convention, you added links pointing to the disambiguation pages Current and Power. Such links are usually incorrect, since a disambiguation page is merely a list of unrelated topics with similar titles. (Read the FAQ* Join us at the DPL WikiProject.)

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 * Corrected. Qniemiec (talk) 08:45, 15 August 2021 (UTC)

Proposed deletion of Tamás Tóth (film director)


The article Tamás Tóth (film director) has been proposed for deletion&#32;because of the following concern: "Lots of mentions, but no in-depth coverage so does not pass WP:GNG, and with only some minor awards, does not meet WP:NFILMBIO."

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 * Sorry, but this is what bugs me as a long-year Wikipedia author and editor again and again: that from time to time some individuals claim for themselves to be judges whether something or somebody is worth to be mentioned, or not, argueing with their interpretation of some WP's regulations. In this particular case something that one might also call "cultural profiling", in my humble opinion. Because the point is, in my eyes, that the English WP edition as the largest worldwide is also the one, where the majority of WP "customers" looks first for something or somebody, also from the large non natively English speaking part of the world and/or from countries with less active authors, so something's or somebody's "notability" not necessarily needs to reflect his, her or its notability from the English speaking part of the world's point of view - it's also quite possible that an article on some item turns up in the WP's "flag ship", i.e. its English edition, first, and not in the national (in this particular case the Hungarian) edition where it actually should show up first. So making things short: your objection is that Tamás Tóth (film director) is not worth or not important enough to be mentioned in the English WP, correct? As you can see from your own welcome post from 2011, I'm already with the WP for sufficient time to realize that so called "edit wars" have a long tradition within the WP, unfortunately not for its sake, hence I'm far away of initiating another "arm wrestling" on this issue. If you decide to delete the article, do it. I've done my best to compose the article, and to verify its dispersed and oftenly outdated or worth to be corrected/updated sources - if you think, you're doing your best to erase it, you will have to do it: it's your conscience. Qniemiec (talk) 16:58, 5 February 2023 (UTC)

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