<p>A few weeks ago, I decided to self study for the AP Stats exam, and at this point, I am not sure if that was such a good idea... At any rate, I have a few questions.</p>
<ol>
<li><p>Can you briefly explain t-distribution and when it is used. I am not quite sure. </p></li>
<li><p>So with confidence levels, it's written that a "a+-b is a 95% confidence level interval" In this case, it's not accurate to say that "it is 95% confident that the true value will fall below a+b," is it? If not, how can i modify the sentence to make it true?</p></li>
</ol>
<p>Thanks so much:)</p>