The Bureau of Labor Statistics reports the following labor costs per hour in each of four countries for a four-year period. Use the coefficient of variation to compare the degree of variation in labor costs among the four countries during this period. According to your calculation, which country showed the greatest variation in labor costs over the four-year period? (Notice we€™ve added a column of standard deviations for each country€™s data.)

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2006 2007 2008 2009 ơ 24.32 23.97 27.80 30.36 2.63 Germany 39.70 43.91 48.22 46.52 3.21 Singapore 3.77 15.71 18.85 17.50 1.91 Argentina6.577.979.9510.141.47 Japan