math ans

this post has a v diff tone n mood as compared to alex's.. but heck.
bo bian.

ANS FOR LINEAR REG ASSIGN:
1i) r= 0.899
iii) a= 0.227, b=-0.0103
2ai) x bar=21
ii)163
iii) r= -1/7
iv) 16

Also, pls note that mr ng passed me some math ans:
ie- RJC 07 T3CT H2 math SOLUTIONS
AJC H2 math mid yr CT07 SOLUTIONS
and also some A3 summary on key concepts in vectors

if you're interested in making copies pls get them from me individually, alternatively if alot of ppl want i can 'scan' n upload it here.