Hi Simon,
Thanks for your comments about my eralier mail .I have more questions
....Apologies if many of you find my queries too trivial !
I have four columns of data following the relation A=X+Y/2
A X Y Y/2
11.5 9 5 2.5
11 8 6 3
11.85 9.1 5.5 2.75
12.15 9.3 5.7 2.85
11.8 8.9 5.8 2.9
12 9 6 3
11 8 6 3
11.65 8.7 5.9 2.95
12 9 6 3
11.05 8 6.1 3.05
SIGMA 0.442 0.505 0.333 0.166
VARIANCE 0.195 0.255 0.111 0.027
Why is the sum of squares rule not valid here ? How can I relate the
variances of A,X & Y/2 ?
Vishy.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|