We all know Tux as the Linux penguin, and those that know me, understand how much I hate Microsoft, and that my [core logo][1], as shown down the right of my blog with Windows Sucks is what I preach. Well I’ve now had this made into a logo on tee-shirts.
As part of searching for images, I’ve come across a few alternative images that I really like, Tux and the BSD demon, Tux and the loosing Windows and MSN logo. You can find more of my collected works at Tux Images
MySQL’s built-in AVG() computes the arithmetic mean — the sum divided by the count. That is the right default for many questions, but it is not always the right measure of central tendency.
MySQL offers three different approaches to extending the SQL capabilities with the default product you download and install. These are: User Defined Function (UDF) MySQL Manual MySQL Plugin MySQL Manual MySQL Component MySQL Manual For the purposes of this post I will be using the current LTS version MySQL 8.
The one-sample Z-test determines whether a sample mean differs significantly from a known population mean when the population standard deviation is also known. It is the appropriate test when the population parameters are established — quality control benchmarks, national averages, long-run process measurements — and you want to evaluate whether a new sample is consistent with them.
