Mean and Statistics

Calculate the mean:

99, 87, 84, 91, 97, 86, 83, 90, 93

• 101.2

• 90

• 81

• 73.6

Calculate the mean:

12, 8, 5, 11, 9, 17, 13, 7, 21, 27

Calculate the mean:

56, 43, 62, 59, 57, 61, 58, 44

Calculate the mean:

69, 73, 62, 67, 64, 62, 75, 78, 81, 77, 84

Find the Mean Absolute Deviation:  10, 9, 3, 8, 10.  The Mean is 8

Mathematical Equivalence

ON

Find the Mean Absolute Deviation:  5, 11, 2, 7, 16.  The Mean is 8.2 

Mathematical Equivalence

ON

Which dot plot shows more consistency? a or b?

• a

• b

Which dot plot shows more variability? a or b?

• a

• b

What is the first step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean

• Find the mean of the distances

• Find the mean of the data

What is the second step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean

• Find the mean of the distances

• Find the mean of the data