Rory is working on his science fair project. He’s getting an early start because it is a psychology experiment and he needs to subject at least 60 people to a questionnaire. In the meantime, dad is trying to relearn what he used to know about determining statistical significance in a dichotomous study using a binary response scale. Turns out, the study will employ a (simple) 2 x 2 contingency Chi-square analysis. Duh.
And remember . . . the critical value for determining statistical significance in a contingency Chi-square when df = 1 is . . . wait for it . . . 3.841.
Gotta pump up that N value. Can we get 80 instead of 60?
Useful links:
http://web.pdx.edu/~newsomj/da1/ho_chisq.pdf
