The means and mean absolute deviations of Sidney’s and Phil’s grades are shown in the table below. Means and Mean Absolute Deviations of Sidney’s and Phil’s Grades Sidney Phil Mean 82 78 Mean Absolute Deviation 3. 28 3. 96 Which expression represents the ratio of the difference of the two means to Sidney’s mean absolute deviation? StartFraction 82 over 3. 28 EndFraction StartFraction 4 over 3. 28 EndFraction StartFraction 4 over 0. 68 EndFraction StartFraction 82 over 0. 68 EndFraction.