Posted by **Stuart** on Sunday, March 29, 2009 at 4:47pm.

A sample of eight observations of variables x and y is shown below:

x 5 3 7 9 2 4 6 8

y 20 23 15 11 27 21 17 14

Find the value of coefficient of correlation, r.

a) - 0.991

b)0.872

c)- 0.512

d)0.942

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