Comcasts customer service department asks its customers to rate their over-the-phone service on a scale of 120

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Comcast’s customer service department asks its customers to rate their over-the-phone service on a scale of 1–20 immediately after their service has been completed. The company then matches each customer’s rating with the number of minutes the person waited on hold. The following table shows the ratings and number of minutes on hold for 10 randomly selected customers and can also be found in the Excel file hold.xlsx.

Minutes Rating Minutes Rating 4 15 2 16 8 13 10 14 0 18 3 20 5 10 8 14 6 14 4 13

a. Calculate the sample covariance.

b. Calculate the sample correlation coefficient.

c. Describe the relationship between x and y.

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Business Statistics

ISBN: 9780133852288

2nd Edition

Authors: Robert A Donnelly, Robert Donnelly Jr

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