The means and mean absolute deviations of the amount of rain that fell each day in a local city, last week and this week, are shown below. Means and Mean Absolute Deviations of Rainfall Last Week and This Week Last Week This Week Mean 19. 7 cm 19. 3 cm Mean Absolute Deviation 4. 6 cm 5. 2 cm The difference in the mean rainfall is approximately what percent of the mean absolute deviation of the this week’s rainfall? 8% 23% 27% 67%.