<p>I found it…I think it’s a question in a practice exam from a review book. If you want, I’ll PM you the exact question, but the answer was 93%.</p>
<p>Edit: Just saw your reply, sorry!</p>
<p>vomitcom is right </p>
<p>@HawkAce what’s it like being so wrong?</p>
<p>Guys, I’m not trying to be arrogant. I know that I reread the question twice and it says three days over three weeks. If you don’t want to accept it, fine by me, but don’t bash me for being pretentious. And I’m not trying to demean anyone. Relax.</p>
<p>@catchinginfinity i think ur right </p>
<p>@hislik how does it feel being mean?</p>
<p>If you don’t want my help, so be it. I’m not checking this thread anymore. Don’t tag me either.</p>
<p>@Hawkace I was mocking your arrogance because you were saying things like “Sorry, you’re wrong” like an a-hole , chill out.</p>
<p>@hislik Sorry if I sounded like an a-hole. I just wanted to make a point. Either way, there’s no point in comparing answers. I rather just wait until the results come out. </p>
<p>how is the curve for this year looking?</p>
<p>higher or lower than the 2007?</p>
<p>This year seemed to be much easier, so I’m expecting a lower curve.</p>
<p>oh? from the kids in my class everyone got rekt, but maybe its just my wishful thinking</p>
<p>Ah, I may be wrong then. We need a larger sample size to know for sure :D</p>
<p>make sure its a random sample to find out :D</p>
<p>^Hahaha
Kind of mean, but I hope we were the only ones who thought it was easy…</p>
<p>Did anyone know how to do the X1-X2 vs X1+X2 question?</p>
<p>What did you guys say for the two methods, email and phone call for the alumni group?</p>
<p>When you subtract variables their variances still add, so only the center is different.</p>
<p>@Hawkace You do realize that your approach implies that three days out of two in one week can be chosen (which is logically impossible)? The question stated that the checks were done weekly, so the answer still stands at 8/125 or 0.064.</p>
<p>The phone call method would be better because the respondents are randomly selected and therefore, the results can be generalized to the population. For the email method, the respondents would be volunteers, and they may differ in some way from the rest of the population. For example, the people who have the time to voluntarily take the survey may be unemployed and have lower yearly income than the rest of the population, which may cause them to underestimate the average yearly income. Therefore, method 2 is better. </p>