Main Page

Explain xkcd: It's 'cause you're dumb.
(Difference between revisions)
Jump to: navigation, search
(Missed one)
Line 8: Line 8:
 
and only {{#expr:{{LATESTCOMIC}}-({{PAGESINCAT:Comics|R}}-10)}}
 
and only {{#expr:{{LATESTCOMIC}}-({{PAGESINCAT:Comics|R}}-10)}}
 
({{#expr: ({{LATESTCOMIC}}-({{PAGESINCAT:Comics|R}}-10)) / {{LATESTCOMIC}} * 100 round 0}}%)
 
({{#expr: ({{LATESTCOMIC}}-({{PAGESINCAT:Comics|R}}-10)) / {{LATESTCOMIC}} * 100 round 0}}%)
remain. '''[[Help:How to add a new comic explanation|Add yours]]''' while there's a chance!
+
[[List of unexplained comics|remain]]. '''[[Help:How to add a new comic explanation|Add yours]]''' while there's a chance!
 
</center>
 
</center>
 
== Latest comic ==
 
== Latest comic ==

Revision as of 13:45, 4 May 2013

Welcome to the explain xkcd wiki!

We have collaboratively explained 4 xkcd comics, and only 1721 (100%) remain. Add yours while there's a chance!

Latest comic

Go to this comic explanation

Linear Regression
The 95% confidence interval suggests Rexthor's dog could also be a cat, or possibly a teapot.
Title text: The 95% confidence interval suggests Rexthor's dog could also be a cat, or possibly a teapot.

Explanation

Linear regression is a method for modeling the relationship between two sets of data, assuming that the two have a linear correlation (as opposed to, say, a quadratic correlation or no correlation whatsoever). The model determines a "best-fit" line through a scatter plot of the datasets, together with a coefficient of determination, usually denoted r2 or R2. This is a number between 0 and 1, which indicates how close the points are to lying on a line. A value of 1 means perfect correlation, while values close to 0 indicate little or no correlation.

Constellations are patterns created by linking the apparent positions of stars. One could create fake constellations by connecting assorted points.

In this comic, a set of data has had linear regression and some form of statistical analysis applied to it, indicating that there is insignificant correlation between the two. The data points are so widely scattered that (as noted in the comic) it is easier to connect the data points in a constellation-like pattern than it is to determine whether the correlation is negative or positive (without looking at the trendline, of course). Because of this, Randall suggests we should be suspicious of any conclusions drawn from this data.

The mention of a teapot may be a reference to Russell's teapot.

Transcript

Ambox notice.png This transcript is incomplete. Please help editing it! Thanks.

[A two-panel comic with a caption underneath drawn in a combination of black and red. The two panels show an identical square of scattered black dots, with only the red additions being different. A black caption is written below, spanning both panels.

[The left panel shows a slightly rising red line drawn through the middle of the panel, passing near a few dots but not obviously related to most of them]

R2=0.06

[The right panel shows many of the dots connected by red lines to form a stick figure of a man resembling the constellation Orion, with the hand on the reader's right raised and holding an object.]

Rexthor, the Dog-Bearer

[The caption below is black and applies to both panels.]

I don't trust linear regressions when it's harder to guess the direction of the correlation from the scatter plot than to find new constellations on it.



Is this out of date? Clicking here will fix that.

New here?

Last 7 days (Top 10)

Lots of people contribute to make this wiki a success. Many of the recent contributors, listed above, have just joined. You can do it too! Create your account here.

You can read a brief introduction about this wiki at explain xkcd. Feel free to sign up for an account and contribute to the wiki! We need explanations for comics, characters, themes, memes and everything in between. If it is referenced in an xkcd web comic, it should be here.

  • List of all comics contains a complete table of all xkcd comics so far and the corresponding explanations. The missing explanations are listed here. Feel free to help out by creating them! Here's how.

Rules

Don't be a jerk. There are a lot of comics that don't have set in stone explanations; feel free to put multiple interpretations in the wiki page for each comic.

If you want to talk about a specific comic, use its discussion page.

Please only submit material directly related to —and helping everyone better understand— xkcd... and of course only submit material that can legally be posted (and freely edited.) Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.

If you need assistance from an admin, post a message to the Admin requests board.

Personal tools
Namespaces

Variants
Actions
Navigation
Tools

It seems you are using noscript, which is stopping our project wonderful ads from working. Explain xkcd uses ads to pay for bandwidth, and we manually approve all our advertisers, and our ads are restricted to unobtrusive images and slow animated GIFs. If you found this site helpful, please consider whitelisting us.

Want to advertise with us, or donate to us with Paypal?