8:3 18. Coefficient of correlation between two points. From the followiag given sets of observations find the coefficient of correlation: (a) y (b) 69 85 102 50 70 87 109 48 Explain why you are not suprised if you find r=+1 or -1. If another pair of values be supplied to (a) or (b), when would you still expect r=+1 or -1.

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