Correlation vs. Causation

One of the arguments students will encounter repeatedly is that of causation and correlation.  Whether the argument is about Anthropogenic Global Warming, or minority incarceration rates, or gun control, or smoking, or whatever subject, all too often students (and voters, and taxpayers) fall prey to this logical fallacy.

The blog that this graph links to concerns drug discovery and the pharmacology industry.  The problem of understanding correlation and causation is universal.  Clearly, one would have a hard time finding a logical connection between the importation of fruit and automotive fatalities (unless the fruit in question was the banana, and the old "slipped on a banana peel" joke could be put into play).  But, according to these statistics carefully graphed, there is a direct correlation between the two.

Students must constantly be on guard when presented with such compelling evidence.  Correlation does not imply causation - a mantra for the coming decade.

One More on Climate Change

Still not meaning to get political, I intend this next example to be a warning about looking at data.  The fact is, anyone with an agenda can manipulate the presentation of data in this way.  Students need to know not only how graphs work, but how the data set can be presented to appear to be something other than it actually is.  This video examines a graph commonly used in AGW (Anthropogenic Global Warming) presentations.



Whether dealing with junk science, or with claimed rates of return for a mutual fund, or any number of situations, people need to know to ask questions.  They also need to know which questions to ask. Skepticism is always healthy, and especially when someone is reaching for your wallet.  More especially when they claim to be doing you good while reaching for your wallet!

Physics and Astronomy Symbols

A very cool link to a project of the University of Nottingham called Sixty Symbols. Clicking on a symbol will give you an explanation of the symbol, and a professorial explanation of why the symbol and what it represents is important.

Math Activities On-Line

I found this math-oriented site when looking for some information on isometric projection. My youngest was trying to draw a picture of a Popsicle-stick log cabin that she made. She was getting frustrated, and I showed her a free-hand method of 3-dimensional drawing. It wasn't clicking, so off we went to the internet to research. The site has some interesting flash games, activity packs, and such.