I posted on my Plurk
I wished for an easier way to update my status on social sites such as Facebook
, Twitter
and Plurk
. The answer I got was Ping.fm
. It is a closed beta, but the code is pingyoulater to get it.
It’s wicked cool, easy and just works. It also interfaces to 17 different sites, I only use 4 of them.
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.
