The following is a set of data from a sample of nequals=11 items. Complete parts? (a) through left parenthesis c right parenthesis .(c).
X 15 18 11 8 4 10 13 20 3 7 2
Y 45 54 33 24 12 30 39 60 9 21 6
a. Compute the sample variance
b. Compute the coefficient of correlation
c. How strong is the relationship between X and Y?