<p>what do you mean by inference... assumptions </p>
<p>I feel like a looser i am only taking four ap tests. I should have self studied for a few more. this probably why i didn't get into Penn. ugh.</p>
<p>piccolo</p>
<p>non-matched 2 sample-t requires 2 independent samples</p>
<p>matched 2 sample-t requires 2 dependent samples</p>
<p>only one can be applicable....the 2 samples are either independent or dependent</p>
<p>yeah 2 sample t test, i know i got a four on that baby!</p>
<p>Well mere logic and reasoning my butt! Gee... you're so modest. :)
Also, why two days Piccolo Junior? So you can Google up a decent response?</p>
<p>That's true Piccolo, and I'm one of those people who loves contradicting cocky people and highly despises them... LOL~ Wise up. Stop being so Cocky.</p>
<p>I can't believe that I originally did the 2 sample t-procedures but redid them after having completed the problem because I all of a sudden thought that it was a matched-pair t-test. I probably got a 4 on the first essay and maybe a 4 on the second one. I can still get a 5 (even though I barely answered #6).</p>
<p>I thought the MC was fairly easy... we took a practice test in our class last week and I thought the multiple choice from that (2002 AP Test) was harder then it was today.
The FR was alright except for #6... we never learned how to do that. I got the first part right I think, but the last 2 parts I really had no idea how to do. someone elaborate in 2 days please. </p>
<p>I really have no clue how I did thought... all I want is a 3.</p>
<p>I thought it was an okay test.
MC was average.
FR was rather easy (except for parts on #6)
I really hope I got a 4.</p>
<p>Samples may be independent or dependent, depending on the hypothesis and the type of samples:
-Independent samples are usually two randomly selected groups
-Dependent samples are either two groups matched on some variable (for example, age) or are the same people being tested twice (called repeated measures) </p>
<p>Dependent t-test
This equation is used when the samples are dependent; that is, when there is only one sample that has been tested twice (repeated measures) or when there are two samples that have been matched or "paired".</p>
<p>It can't be a non-matched 2-sample T because we are not dealing with two randomly-selected independent samples</p>
<p>hmmm... I have the urge to acquiesce with someone, but I feel like I should keep my mouth shut for another day yet.</p>
<p>1 more day!</p>
<p>I did decently well on mc, maybe 2-4 wrong... But FR.. I thought it was easy until I realized I got one completely wrong, and part of 6 wrong (I knew the material, I just used one wrong number). So now I'm really hoping to get a good score.</p>
<p>haha...I definitely didn't realize that #6 was 3 pages until the proctor called time and I was closing the booklet.</p>
<p>I still think it is matched-pairs. My teacher will confirm it tomorrow. When I did the question, I had no question in my mind that it was matched pairs. Why would it be two sampled t-test?</p>
<p>They'll probably give a 3 for two sample t-test if performed correctly. They've done that on previous exams(3 if good execution of inferior technique)</p>
<p>charmelody is right</p>
<p>2006 form b #4 was a matched pair test...rubric indicates that the highest possible score is a 3 if you use two-sample t</p>
<p>So would my flawless execution of a 2-sample z test earn me 3 points on FRQ #4?</p>
<p>how could you do a z-test? for z test you need standard deviation of population not sample!</p>
<p>secondly your teacher should have told you that z-mean test do not show up on FRQ. only Z-proportional test do</p>
<p>two-sample z test would get you nothing, considering the population standard deviation is unknown</p>
<p>I know, I screwed up lol.</p>