Mean and Outliers in Class Practice

What is the mean of the numbers 3, 5, 7, and 9?

• 4

• 6

• 8

• 5

If you have the numbers 2, 4, 6, 8, and 100, what is the mean?

• 24

• 20

• 30

• 15

What is an outlier in a data set?

• A number that is repeated

• A number that is much larger or smaller than the others

• The smallest number

• The largest number

Calculate the mean of the numbers 10, 12, 14, 16, and 18 without the outlier 100.

• 14

• 15

• 16

• 17

Which of the following numbers is an outlier in the set: 1, 2, 2, 3, 100?

• 1

• 2

• 3

• 100

If the mean of a data set is 10 and an outlier of 50 is removed, what happens to the mean?

• It increases

• It decreases

• It stays the same

• It becomes zero

Find the mean of the numbers 5, 10, 15, 20, and 25.

• 10

• 15

• 20

• 25

What is the mean of the numbers 4, 8, 12, 16, and 20 without the outlier 100?

• 12

• 14

• 16

• 18

Which number is an outlier in the set: 10, 10, 10, 10, 50?

• 10

• 20

• 30

• 50

If the mean of a data set is 30 and an outlier of 5 is removed, what happens to the mean?

• It increases

• It decreases

• It stays the same

• It becomes zero