1 EASY Find the mean absolute deviation: 4,7,4,2,6,8,5,2,7,4

 2 MEDIUM The mean of a set of 5 numbers is 20. The absolute differences of the mean and each number are 5,6,2,9,3. What is the mean absolute deviation?

 3 HARD What is the percent deviation from the mean in this list: 264,623,163,177,285,163,918,427,824,666 0%62.3%26.3%32.3%54.4%

 4 HARD Find the mean absolute deviation: 45,26,35,267,32,45,72,34,54 45.2126.1631.6165.3327.43

 5 HARD Find the mean absolute deviation: 62,36,21,78,34,77,49,81,37,69