Mean Equals Average

Dr. Dre is a dentist. He needs to report on the average number of cavities that his patients have.
1, 0, 1, 5, 6, 3, 4

• 3.33

• 2.85

• 3

• 3.5

Find the mean.
120, 120, 90, 70

• 120

• 400

• 200

• 100

Find the mean.
0, 0, 0, 1, 4

• 1

• 14

• 3

• 5

What is the mean of these numbers?
1,2,3,4,5?

• 3

• 5

• 4

• 2

What is the mean of these numbers?
2,2,2,2,2

• 10

• 2

• 8

• 32

Find the mean of these numbers:
4,2,5,6,3

• 2

• 5

• 4

• 6

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1

• 6

• 4.5

• 4

A girl plays a game 3 times. In the first 2 games, she scores 5 and 6. What score does she need in the third game to have a mean score of 5?

• 5

• 6

• 4

• 0

A boy takes 5 tests. His teacher loses the 5th test, but knows he had a mean score of 8. 
In his first 4 tests he scored 9,7,10,8. What did he score in the 5th test?

• 30

• 8

• 5

• 6

How do you calculate the mean of a set of data?

• Sort the data into numerical order. Find the middle piece of data.

• Subtract the smallest data point from the largest data point.

• Add all of the data and divide by the number of data points.

• Find the most common data point.