<p>i stuggle so much on the part 2s i can never ifgure out what to do expecually for ones that involve probability i can evenutally get all the hyp tests but when it comes to probability i either mix it up with binomal crap or just total blank out any sugesstions please im desperate.</p>
<p>Dont freak out, the test is easier than you think it's going to be. I went into it thinking I was going to get a 3 cause I realized the night before that I didnt know anything... Got a 5...</p>
<p>Calm done, breathe, you'll do fine.</p>
<p>:)</p>
<p>im so scared. ughhhhhhhhhhhhhhhhhhhhhhhhh and this one problem is bugging the heck out of me..i would post it but it involves some reading and a data set</p>
<p>this may sound really stupid, but please i need help!</p>
<p>when do you use t-tests (i know that they're used when the sample size is <30, and when given a mean), anything else to know? and chi-square are only to be used for determiningg sigificance of quantitive data, but not for proportions, etc. am i right? HELP! :eek: (exam begins in 3 hours in Japan!)</p>
<p>I'm gonna have to ask you all to relax. It will probably be a lot easier than you think, and there's always the curve. If you panic, you'll probably just forget everything you've tried to memorize.</p>
<p>You use the t- distribution if you don't know the population standard deviation. You can use chi square for comparing two distributions, but you can usually also just use the two sample z-test, so if you want less to memorize just go with the z-test.</p>
<p>Wait... they have AP exams in Japan?</p>
<p>:)</p>
<p>thanks jml!!!!!!!! :)</p>
<p>yeah a bunch of them are adminstered at international schools, where the majority of the kids are american.....</p>