Posted by brian on Saturday, October 11, 2008 at 2:08pm.
1000 significance tests are performed using alpha = .05. Assumimg that all null hypotheses are true, about how many of the test results would you expect to be statistically significant?

statistics  PsyDAG, Saturday, October 11, 2008 at 11:06pm
About .05 or 5% of 1000 = 50. P = .05 indicates that the probability of the observed events would occur by chance 5 times in 100.
I hope this helps. Thanks for asking.