<p>I got stuck on a few of my homework problems due tomorrow afternoon. They are on this pdf: <a href="http://www.stat.tamu.edu/%7Eymu/stat211/211_homework_03.pdf%5B/url%5D">http://www.stat.tamu.edu/%7Eymu/stat211/211_homework_03.pdf</a></p>
<p>I wanted to check my answer on 3, and 11 part F.
I was totaly lost on 4 and 13.
Any help would be great.</p>