Archive | Statistics RSS feed for this section

Testing a hypothesis: Over 21 edition

24 Apr

Tonight, I am going to lecture about hypothesis testing. I plan to show my students this video I found on BoingBoing:

The question for the students: was this a fair test?

Correlation is not causation (nudge, nudge, wink, wink)

4 Jul

There is no end to the media presenting correlations as causation. I was struck by this piece in Monitor on Psychology a publication of the American Psychological Society. I think I see a pattern here:

  1. Point out some correlation
  2.  Say that the researchers “controlled for other variables” (always a dubious claim)
  3.  Quickly acknowledge that correlation is not causation
  4. Never report the magnitude of the effect
  5. Write the rest of the article as if causation has been established

 

%d bloggers like this: