<p>Do you need to know how to calculate a Type II error for the ap test?</p>
<p>no you do not need to know how to calculate beta for the test.....just be aware of the things that influence beta</p>
<p>Is there a way to find the Z-score with a TI-83+? I think it has something to do with the "Invnorm(" function. How does it work?</p>
<p>InvNorm(% as decimal, mean, standard deviation) mean and standard are assumed 0 and 1 unless you type something different in.</p>
<p>Is the "% as decimal" the area under the curve up to the Z-score?</p>
<p>just do a 1 sample Z test w/ ur data.... it should give u a z-score value.</p>
<p>Um, for say a 95% confidence interval do invNorm((1+.95)/2, 0, 1) so yea the whole graph up to that point.</p>