=+9.8 ● The following data on gross efficiency (ratio of work accomplished per minute to calorie expenditure per minute) for trained endurance cyclists were given in the article “Cycling Efficiency Is Related to the Percentage of Type I Muscle Fibers” (Medicine and Science in Sports and Exercise [1992]: 782–88):

18.3 18.9 19.0 20.9 21.4 20.5 20.1 20.1 20.8 20.5 19.9 20.5 20.6 22.1 21.9 21.2 20.5 22.6 22.6