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Anya recorded the height in inches of 10 students in her class. The results are shown below.


{56, 60, 57, 61, 55, 59, 61, 64, 57, 60}


What is the mean absolute deviation of the data set?


A. 1.1


B. 2.2


C. 22


D. 59

Can someone give me a real answer please?