<p>i noticed that in the collegeboard.com sample FRQ answers, they always write out a long formula in their solutions to every question, like the super complicated formulas for difference of proportions or something. </p>
<p>our teacher NEVER went over formulas in class and was saying all year that on the AP test it'd be cool if we just used our calcs, but now i'm not sure anymore.</p>
<p>do we really have to write out all the formulas for our FRQs?</p>
<p>if so, i'm in trouble because i honestly don't know any formulas off head besides the basic z-score and t-score. it's probably too late for me to attempt to memorize them, but w/e</p>
<p>i believe a lot of the formulas for the tests/confidence intervals you do in your calculator are given on the formula sheet that they give you on the actual AP test. At the very least, the sheet gives you certain parts that you use in the formula. For example the give you the st. dev of two proportions...</p>
<p>sqrt[p(1-p)]*sqrt[1/n1 + 1/n2]</p>
<p>The test statistic for a 2 proportion z test is</p>
<p>p1 - p2 / (st. dev written above)</p>
<p>As long as you know how the formulas generally fit together, I believe they give you a lot of the difficult stuff that would be just memorization.</p>
<p>can someone show me how to do pair t test ?? (matched t test right?)</p>
<p>^^^It's the same thing as the t-test on your calculator.</p>
<p>I think the key is to state your justifications. Other than that, your FR answers shouldn't be that long, even for the investigative task.</p>
<p>FR should state the test you're using. The conditions. The written formulas, the numbers plugged into the formulas, and the results. Also don't forget to include "fail to reject" or "reject the null" with a conclusion corresponding to the question.</p>
<p>FR should state the test you're using. The conditions. The written formulas, the numbers plugged into the formulas, and the results. Also don't forget to include "fail to reject" or "reject the null" with a conclusion corresponding to the question.</p>
<p>Yup. Memorize that.</p>
<p>how much does it matter if, in your written formula, you write p hat instead of p or sigma instead of s (for example) .. but you do the problem right ???</p>
<p>P.S. commemoration of 69 posts...yes i am immature.</p>