You are researching a species of grasshopper and are interested in how far it can jump. You have the jump distances for 11 grasshoppers displayed below.


Jump distances (inches): 19.4, 39.6, 29.6, 23, 32.9, 35.9, 23.3, 24.8, 41.3, 28.7, 27.2
Check your sum: 325.7


Find the following. Round your answers to two decimal places if needed. 

a) mean:


b) mean absolute deviation (MAD):