The following table indicates the mileage, as calculated by owners and by current government standards ...

        Please show me how to obtain the covariance   and coefficient of correlation. There are several methods for calculating   fuel economy. The following table indicates the mileage, as calculated by   owners and by current government standards: a. Compute the covariance. b.   Compute the coefficient of correlation. c. Which do you think is more   valuable in expressing the relationship between owner and current government   standards mileage—the covariance or the coefficient of correlation? Explain.          Car Owner Current Proposed   2005 Ford F-150 14.3 16.8 15.7   2005 Chevrolet Silverado 15.0 17.8 13.9   2002 Honda Accord LX 27.8 26.2 25.4   2002 Honda Civic 27.9 34.2 33.3   2004 Honda Civic Hybrid 48.8 47.6 36.0   2002 Ford Explorer 16.8 18.3 16.8   2005 Toyota Camry 23.7 28.5 24.2   2003 Toyota Corolla 32.8 33.1 32.7   2005 Toyota Prius 37.3 56.0 44.3