ISI questions on correlation

Posted by deepak on Apr 17, 2012; 9:41am
URL: http://discussion-forum.276.s1.nabble.com/ISI-questions-on-correlation-tp7472992.html

Could someone please explain how to solve the 2 questions (see attached image)? I haven't studied correlations so would greatly appreciate if someone could suggest an online resource for this.

Thank you!