« Time for Web 2.0 to step down | Main | Supercomputer research fights African parasite »

September 20, 2007

Mean vs median and blogs

Seth was making a point on the measures of central tendency, specifically how the mean page views by a blog visitor might not be the best indicator of a typical visitor to your blog.

I made these graphics for a lecture I'll be giving about medical statistics, to give a description view of the two types of skewed distributions. The first, the negatively skewed distribution is what Seth is talking about where the mean has a lower value than the median. In the second, the positively skewed distribution, you might think about the distribution of income in a particular country. [NB: the actual values of mean and median were were not calculated. The mode is what it is, the value with the greatest frequency.]

Skewneg

Skewpos

TrackBack

TrackBack URL for this entry:
http://www.typepad.com/services/trackback/6a00d8341bffa053ef00e550722f518833

Listed below are links to weblogs that reference Mean vs median and blogs:

Comments

blog comments powered by Disqus