Variability of Data

What is the value of the interquartile range?

• 115

• 118

• 124

• 9

• 3

Select ALL the statements that are TRUE about the dot plot.

• It is best to use the mean to describe the center of the data.

• It is best to use the median to describe the center of the data.

• The shape of the data could be described as "bimodal"

• The shape of the data could be described as "skewed"

• The shape of the data could be described as "symmetrical"

How many fish are represented in the data?

• 3 to 18

• 9

• 25

• 5

• Not able to tell

How many fish could have been exactly 9 inches?

• 5

• 9

• 6

• 14

• 1

Find the MAD (mean absolute deviation) for the following data set.

1, 5, 7, 9, 10, 11, 13, 15, 19

Find the IQR (interquartile range) for the following data.

1, 5, 7, 9, 10, 11, 13, 15, 19

The MAD (mean absolute deviation) score was calculated for 4 different sets of data. Which MAD score below would represent the set of data with the highest variability?

• MAD: 4.67

• MAD: 2.32

• MAD: 1.68

• MAD: 5.23

Which data set shown in the graphs would have the lowest variability?

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What is the median shown by the data in the graph?

• 4

• 4.5

• 5

• 3

• 3.5

Which of the graphs below would have the highest MAD (mean absolute deviation) score?

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