<p>I heard this test was easy last year .. hard the year before
does this mean it's gonna be hard this year?!?!</p>
<p>I don't know what to study .. only two days left
I just kept up with school work, but havent started reviewing :( </p>
<p>everyone says stat is a JOKE .. hope it is !!</p>
<p>can i ask a question here?</p>
<p>do we ever use
z test
2 sample ztest
z interval
2 sample zinterval
in our calculators?</p>
<p>if we do, then what is the difference between z test vs 1prop z test, z int vs 1prop z int, 2sampleztest vs 2propztest, and 2samplezint vs 2propzint??</p>
<p>Fivewinks
Yeah, you definitely use those tests, at least in our class and the reviews I've seen. Proportion tests are for when you know the TRUE population parameter, as in "a survey found those who wanted cheaper lunches to be 35%, and the actual proportion is 40% blah blah blah." Sample tests are if you are only given the sample. I can think of this really clearly in my head, but it's not coming out real well. Sorry, and I guess ask your teacher to explain it better.</p>