<p>How do you find the critical value when performing a chi square test?</p>
<p>Also, does an AP Statistics class actually derive the Chi Square Test? Knowledge of Gamma Functions and calculus is necessary. I seriously doubt this, but does the AP curriculum contain the derivation? If it doesn't, isn't the AP curriculum just basically giving students a "magic" equation to plug numbers into? Very uneduacational.</p>
<p>The Ap curriculum might, but that is not to say that there are no classes who derive the equation. My class works out every formula for ourselves before we are told about it.</p>
<p>The critical values you just look on the chart and the df = # outcomes-1. You can use a table or find a program that will give you the answer. I dont think the AP test actually fully has this tets on it. I dont think you ever have to look up a value for it, and the gamma function is not on there.
Why dont they test more on it, I dont know. Why dont they test on non-parametric tests, ask them. It seems most of the test is still on probability theory even thought 40% is suppose to be inferential stats.</p>