Chi-Square Goodness-of-Fit Test

One-Way Chi-Square Goodness-of-Fit Test (by hand and on calculator)

The "one-way" in the title of this video refers to the fact that this more basic type of Chi-Square test involves tests on one-way frequency tables, which are the ones where you have only one list of numbers. This video covers both common types of one-way problems: testing for uniform distribution, and testing for a predicted pattern (i.e. weekends being busier than weekdays).

"Two-Way" Chi-Square Goodness-of-Fit Contingency Table Test

These are called "two-way" tests because they involve two-way frequency tables (a.k.a. contingency tables), which are the type of frequency table that have a grid of numbers. The hard part of these is coming up with the "expected" values for the table, but once you get the hang of the formula for E, you can really plug-and-chug through them fast.

Two-Way Chi-Square Goodness-of-Fit Tests (on your CALCULATOR)

In this video, we'll see how to do "two-way" Chi-Square tests on a TI-84 calculator. Unfortunately, for these problems you have to input the "expected values" matrix, so that means you basically have to work half the problem by hand anyways. But at least your calculator will do the tedious big summation at the end for you, and spit out a P-value, so that's better than nothing.