<p>Is a 2 proportion t-test the only test with pooled data. I got the formula as p1-p1/ sqrt(p(1-p)(a/n1+1/N2)) p is the pooled proportion: x1+x2/n1+n2.
Any tips on the AP Statistics test from people who have had experience with it?
Thanks a bunch.</p>
<p>anyone???</p>
<p>Yes, I believe so.</p>
<p>only pool when p1 and p2 in the null are equal and independent.</p>