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tabulated the weight of the early morning mail x in hundreds of pounds and the number of orders in the mail Y, in thousand the

tabulated the weight of the early morning mail x in hundreds of pounds and the number of orders in the mail Y, in thousand the data summary is given as {x = 210, {y = 530, {xy = 722.5, {x² = 2870 and {y² = 18,190, n = 20

Compute the Pearson correlation coefficient

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