Outlier and Box Plot

Using the information below, identify which of the following is NOT an outlier:
Q1 = 53
Q2 = 55
Q3=61

• 73

• 40

• 80

• 73.5

Use the 1.5 IQR rule to determine if there are any outliers for the following numbers:
84, 88, 72, 74, 98, 16, 94

• Yes, 16 is an outlier.

• Yes, 33 is an outlier.

• Yes, 98 is an outlier.

• There are no numbers less than 39 or greater than 124, therefore there are no outliers.

Using the information below, identify which of the following is an outlier:
Q1 = 3
Q2 = 7
Q3 = 12

• 22

• 25.5

• -8.5

• 26

Find the outlier in the set of data 
92, 88, 106, 169, 76, 72, 67, 10, 115, 73, 111, 59 

• 169

• 115, 169

• 111, 169

• 10, 169

When comparing two box plots, what does it indicate if one has outliers and the other does not?

• The dataset with outliers has a larger range.

• The dataset without outliers is more consistent.

• The dataset with outliers is more skewed.

• Both A and B are correct.

Which of the following is true about outliers in a box plot?

• They are always above the upper quartile

• They are always below the lower quartile

• They can be either above the upper quartile or below the lower quartile

• They are always at the median

How is the upper boundary for outliers calculated in a box plot?

• Upper Quartile + (1.5 * IQR)

• Upper Quartile - (1.5 * IQR)

• Lower Quartile + (1.5 * IQR)

• Lower Quartile - (1.5 * IQR)

How is an outlier typically represented in a box plot?

• As a star or dot beyond the whiskers

• As a line inside the box

• As a longer whisker on one side

• As a different colored box

How many outliers are there for this boxplot?

• 6

• 3

• 5

• None

In a box plot, what does a point that lies outside the "whiskers" represent?

• Median

• Mean

• Outlier

• Mode