Attached is an interesting paper by G. Gigerenzer about the problems with common statistical tools for anyone who´s ever been confused by that world... and also for anyone who hasn´t been confused (and maybe should be).
From the abstract:
'Statistical rituals largely eliminate statistical thinking in the social sciences. Rituals are indispensable
for identification with social groups, but they should be the subject rather than the procedure of
science. What I call the “null ritual” consists of three steps: (1) set up a statistical null hypothesis, but
do not specify your own hypothesis nor any alternative hypothesis, (2) use the 5% significance level
for rejecting the null and accepting your hypothesis, and (3) always perform this procedure. I report
evidence of the resulting collective confusion and fears about sanctions on the part of students and
teachers, researchers and editors, as well as textbook writers.'
Warmth,
Grace