How to remember that in the Chi sq formula, s^2 is in numerator and sigma squared in the denominator and not the other way round?
In all of the other formulae for testing a single statistic (e.g., tests for the mean), the quantity we’re testing is in the numerator (e.g., the test statistic for a single mean has the sample mean in the numerator). Similarly, the test statistic for the sample variance has the sample variance in the numerator.
Maybe that’ll help.
Totally! You are a rockstar!
BTW are we expected to know the chi square formula for the exam?
Also, if I were an idiot, I could go on and argue that hypothesized value used to come in numerator previously, but now it comes in the denominator- precisely the reason I got confused in the first place- because I was thinking in terms of hypothesized value. Sometimes, you just have to fake your mind into believing things, like I did just now. I’d call it “The magician effect” 