Quality control inspectors monitor two primary characteristics of the units being manufactured in the company’s main factory: weight and breaking strength. Below is a sample of four recent readings for weight (in ounces) and breaking strength (in pounds).

a. Compute the standard deviation for each data set. 

b. Compute the coefficient of variation for each data set. 

c. As measured by the coefficient of variation, which data set shows the greater degree of variability?

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Weight (ounces)16.5 17:1 117 10.7 Strength (pounds) 126.8 113.1 134.9 122.2