Finding Outliers of Data

A value that is much higher or much lower than the other values in a set of data.

• Outlier

• Box Plot

• Range

• Histogram

When using IQR to find outliers, which formula will identify the lower limit?

• 1.5(IQR)

• Q1 + 1.5(IQR)

• Q1 - 1.5(IQR)

• Q3 + 1.5(IQR)

Find the outlier of the data set.

15, 20, 18, 35, 17, 35, 13

• None

• 35

• 13

• 15

When using IQR to find outliers, which formula will identify the upper limit?

• 1.5(IQR)

• Q1 + 1.5(IQR)

• Q1 - 1.5(IQR)

• Q3 + 1.5(IQR)

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

• 22

• 25.5

• -8.5

• 26

Using the information below, identify which of the following is NOT an outlier:

• 73

• 40

• 80

• 73.5

A bowler had the following scores after 5 games:
 196, 205, 197, 280, and 202.
How much does the bowler’s mean score increase if the outlier is considered, compared to if the outlier is not considered?

• 13

• 16

• 19

• 22

Given the 5 number summary, the minimum is an outlier.

• True

• False

Given the 5 number summary, Find the lower fence.

• 171.5

• 15.5

• 43.4

• 7

Given the 5 number summary, the maximum is an outlier.

• True

• False