Mean, Median, Range, Iqr, Mad

Find the IQR (Q3 - Q1)  of the data

• 30

• 21

• 25

• 9

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

• 3

• 5

• 1

• 2

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

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

• Find the distance each value is from the mean

• Find the mean of the distances / absolute deviations

• Find the mean of the data

Find the MAD:
58, 38, 54, 48, 26, 36

• 43

• 20

• 10

• 12

Which mean absolute deviation would have a greater variability or spread?  4.2 or 8.5?

• 4.2

• 8.5

• 6.5

• 1.1

What is the maximum value?

• 58

• 66

• 64

• 60

Find the mean of the numbers below:

2, 8, 6, 3, 12, 7, 4

• 5

• 6

• 7

• 8