Identifying Outliers

Find the outlier in the set of data:
20, 52, 86, 80, 44, 49, 57, 41, 44, 55

• 86
• 41, 80, 86
• 80, 20, 86
• 80, 86

Find the outlier in the set of data:

4, 11.6, 50, 23, 20.1, 19, 29, 12.7, 8, 23, 57.5

• 57.5

• 4

• 50

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

• 73
• 40
• 80
• 73.5

Using the information below, identify which of the following is an outlier:

Q1 = 3

Q2 = 7

Q3 = 12

• 22

• 18

• -2

• 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

The data set below has an outlier of 42.
2, 5, 12, 15, 19, 4, 6, 11, 16, 18, 12, 12, 42
What effect does removing the outlier have on the distribution of the data?

• The mean will decrease
• The median will decrease
• The mean will increase
• The median will increase

If 20 is added to the data set below, which statement will be true?
50, 55, 55, 60, 62

• The median will be 20
• The mode will increase
• The mean will increase
• The mean will decrease

A data set contains only one outlier. Which statistical measure will most likely remain the same if the outlier is removed?

• Mean

• Mode

• Range

• median