Hypothesis Tests Comparing Standard Deviations of Two Samples

The F-Distribution Table

Yet another distribution! F-values are pretty similar to chi-square, except they're so crazy that you actually need two different degrees of freedom, and therefore the table takes up like 10 pages at the back of your textbook. Kinda nuts, so expect to be doing these mostly on your calculator.

Comparing Standard Deviations of Two Samples

This type of problem isn't covered by many stats classes, because let's face it, standard deviation isn't something people go around hypothesizing about unless they have a lot of time on their hands (or they're running a high-precision factory). Nonetheless, we do have to cover it, so I cooked up a couple of silly examples to get us there.