Statistical significance
Comparing and contrasting, p-values, significance levels and type I error
Practical uses for the "internal" keyword in C# Could you please explain what the practical usage is for the internal keyword in C#?  I know that the internal modifier limits access to the current assembly, but when and in which circumstance should I use it? Can ovulation and menstruation occur simultaneously? Is that possible that ovulation happens in the time of actual menstrual haemorrhage in human females - let say in a case that woman has 21 day cycle and her menstrual period is 7 days?   If yes, does it means that in this particular case the woman has lower chances to conceive? Let $S$ and $T$ be finite non-empty sets such that $|S| = |T|$. Show that the function $f : S\to T$ is onto if and only if it is one-to-one. This is a recent homework bonus question assigned in my Proofs and Conjectures class. It (evidently) includes and evaluates our understanding of elementary-set theory and how to determine and prove that the function f is onto and one-to-one. I haven't been able to really grasp firmly how it is we do this. Help would be much appreciate, thank you. What are tag badges? How do they work? Difference between "should" and "must" What is the difference between "should" and "must"?  e.g. "They should have called the police." Can I use "must" in that sentence or not?  e.g. "You should read his new book." How about this sentence? macOS Sierra restarting download instead of resuming Rsync filter: copying one pattern only I am trying to create a directory that will house all and only my PDFs compiled from LaTeX. I like keeping each project in a separate folder, all housed in a big folder called LaTeX. So I tried running:  rsync -avn *.pdf ~/LaTeX/ ~/Output/   which should find all the pdfs in ~/LaTeX/ and transfer them to the output folder. This doesn't work. It tells me it's found no matches for "*.pdf". If I leave out this filter, the command lists all the files in all the project folders under LaTeX. So it's a problem with the *.pdf filter. I tried replacing ~/ with the full path to my home directory, but that didn't have an effect.  I'm, using zsh. I tried doing the same thing in bash and even with the filter that listed every single file in every subdirectory... What's going on here?  Why isn't rsync understanding my pdf only filter?    OK. So update: No I'm trying  rsync -avn --include="*/" --include="*.pdf" LaTeX/ Output/   And this gives me the whole file list. I guess because everything matches the first pattern... Best location for theme translation files I usually store language files in /languages folder that is located in theme folder and it's also recommended location by WordPress as well. However, it still doesn't look like the best solution because files will be overwritten after theme updates.  load_theme_textdomain function allows to specify a different location and I've been thinking to put languages folder inside of /uploads folder in order to prevent overwriting after theme updates. That folder will be created right after theme activation and language files will be copied there.  My question is, do you think this is a good solution or there is a better way that I'm missing?  I appreciate your insight about this matter. How do I find the right size of filters for a lens? Array Foreach Loop Prints Last Item Only Does Ubuntu follow the Linux Standard Base (LSB)? I'm trying to install the drivers to my wireless adapter ():   I have already tried the following:  sudo add-apt-repository ppa:hanipouspilot/rtlwifi sudo apt update sudo apt install rtl8192eu-dkms   But I'm getting the following error:  E: Unable to locate package rtl8192eu-dkms   I have also tried manually downloading and installing it, but I'm getting this:  make make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.6.0-kali1-amd64/build M=/root/Desktop/20140812_rtl8192EU_linux_v4.3.1.1_11320  modules make[1]: *** /lib/modules/4.6.0-kali1-amd64/build: No such file or directory.  Stop. Makefile:1323: recipe for target 'modules' failed make: *** [modules] Error 2   edit: lsusb output  root@kali:~# lsusb Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 004: ID 8087:07da Intel Corp.  Bus 001 Device 003: ID 1bcf:2c0e Sunplus Innovation Technology Inc.  Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub **Bus 003 Device 002: ID 2357:0107**   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Is there a simple way in Perl that will allow me to determine if a given variable is numeric?  Something along the lines of:  if (is_number($x)) { ... }   would be ideal.  A technique that won't throw warnings when the -w switch is being used is certainly preferred. UEFI machine doesn't boot Ubuntu through NVRAM bootcatalog. How to fix? All chromium extensions throw errors since update to 13.10 Although we can create or update fieldsets using salesforce UI but Is there any way to insert or update FieldSets using apex code (using metadata or API calls) ? How do you detect a network disconnection when downloading a file in java? Show that the sequence $a_{n+1}=a_{n}+\dfrac{a^2_{n}}{n^2}$ is upper bounded Let $\{a_{n}\}$ be defined with $a_{1}\in(0,1)$, and  $$a_{n+1}=a_{n}+\dfrac{a^2_{n}}{n^2}$$ for all $n\gt 0$.  Show that the sequence is  upper bounded.  My idea: since  $$a_{n+1}=a_{n}\left(1+\dfrac{a_{n}}{n^2}\right)$$ then $$\dfrac{1}{a_{n+1}}=\dfrac{1}{a_{n}}-\dfrac{1}{a_{n}+n^2}$$ then $$\dfrac{1}{a_{n}}-\dfrac{1}{a_{n+1}}=\dfrac{1}{a_{n}+n^2}$$ so $$\dfrac{1}{a_{1}}-\dfrac{1}{a_{n+1}}=\sum_{i=1}^{n}\dfrac{1}{a_{i}+i^2}$$ since $$a_{n+1}&gt;a_{n}\Longrightarrow \dfrac{1}{a_{i}+i^2}&lt;\dfrac{1}{a_{1}+i^2}$$ so $$\dfrac{1}{a_{n+1}}&gt;\dfrac{1}{a_{1}}-\left(\dfrac{1}{1+a_{1}}+\dfrac{1}{2^2+a_{1}}+\cdots+\dfrac{1}{a_{1}+n^2}\right)$$ But the RHS might be $\lt0$ for a sufficiently large starting value; for instance, with $a_{1}=\dfrac{99}{100}$ then $$\dfrac{1}{a_{1}}-\left(\dfrac{1}{1+a_{1}}+\dfrac{1}{2^2+a_{1}}+\cdots+\dfrac{1}{a_{1}+n^2}\right)&lt;0,n\to\infty$$  see:   so this method won't let me bound the series and I don't know what else to do. How to parse JSON in iOS App How to activate hyphenation in \ttfamily without explictly setting a font? I am suprised that in the code below no hyphenation is done. And I can not find something about that on the web. Maybe I used the wrong words for searching.  \documentclass{scrartcl} \usepackage{xltxtra} \usepackage{polyglossia} \setdefaultlanguage[spelling=new]{german} \usepackage{tabu}  \begin{document} \begin{ttfamily} \begin{tabu} spread \textwidth {X[l]|X[l]|X[l]|X[l]}     A&amp;     B&amp;     Sichtweise, Haltung, Akzeptanz, useability, Anwenderfreundlichkeit&amp;     D\\ \end{tabu} \end{ttfamily} \end{document}