4. Given the following sample data: x 420 y 2.80 3.60 610 625 500 400 450 550 650 480 565 3.75 3.00 2.50 2.70 3.50 3.90 2.95 3.30 a. Calculate the covariance and the correlation coefficient. Discuss what they represent. b. Briefly discuss the relationship between x and y and what do these statistics tell you.

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