Name: 
 

Lesson 3: The Mean of a Set of Data



 1. 

What is the mean of each of the following sets of data?

140, 80, 90, 90, 120, 110
a.
105
b.
90
c.
110
d.
120
 

 2. 

5, 10, 5, 4, 6
a.
3
b.
4
c.
5
d.
6
 

 3. 

6, 9, 8, 7, 11, 4
a.
6
b.
6.5
c.
7
d.
7.5
 

 4. 

72, 120, 100, 73, 75, 110, 150
a.
100
b.
110
c.
107
d.
105
 

 5. 

12.4, 14.6, 14.7, 13.4
a.
12.8
b.
14.1
c.
12.7
d.
13.8
 

 6. 

33%, 18%, 25%, 35%, 31%, 31%
a.
25.5%
b.
28.8%
c.
24.6%
d.
21.7%
 

 7. 

44, 52, 51, 46, 57
a.
50
b.
51
c.
52
d.
53
 

 8. 

3.4, 1.4, 2.2, 1.4, 4.6, 2.2, 1.6, 1.6
a.
1.8
b.
2.5
c.
1.6
d.
2.3
 

 9. 

78g, 68.5g, 82g, 87g, 91g, 88g, 74.5g, 71g
a.
79g
b.
79.5g
c.
80g
d.
80.5g
 

 10. 

22, 24, 24, 19, 26
a.
21
b.
22
c.
23
d.
24
 



 
Check Your Work     Start Over