Over the years I have worked with many people who do the field work to collect data. They have their process and it works for them. However, their work rarely extends beyond data collection. This o
Month: December 2012
It’s not quite the end of the world as we know it. Â We made it through December 21, 2012 unscathed. It’s not going to be the last time we will make it through such a pseudo-calamity. Â
The example is more of a statistical exercise that  shows the true significance and the density curve of simulated random normal data.  The code can be changed to generate data using either a dif
Recently I’ve been working on some jackknife and bootstrapping problems. Â While working on those projects I figured it would be a fun distraction to take the process and estimate pi. Â IR
Occasionally, I will get requests from clients to calculate the mean. Most of the time it’s a simple request but from time-to-time the data was originally from grouped data. A common approac
I have found that I get data from many different sources. Â These sources range from simple .csv files to more complex relational databases, to structure XML or JSON files. Â I have compiled the di
Graphs can provide an excellent way to emphasize a point and to quickly and efficiently show important information. Sadly, poor graphs can be a good way to waste space in an article, take up time i
Power analysis is a very useful tool to estimate the statistical power from a study. It effectively allows a researcher to determine the needed sample size in order to obtained the required statist