

1. 
Find the mean of {3, 8, 10, 1, 25}. 


A. 
9.4 
B. 
9 


C. 
8 
D. 
1 


Hint 


2. 
You have scores of 62, 75, and 90 on three of your history exams. What do you need to get on your fourth exam in order to have a mean of 80? 


A. 
80 
B. 
100 


C. 
97 
D. 
93 


Hint 


3. 
The mean is the _______ of a set of numbers. 


A. 
middle number 
B. 
arithmetic average 


C. 
highest number 
D. 
most frequent 


Hint 


4. 
Find the mean of {15, 7, 9, 25, 4}. 


A. 
12 
B. 
9 


C. 
13 
D. 
10 


Hint 


5. 
Ben races motorcycles for fun. So far, his lap times, in seconds, are 32, 35, 33, and 32. What time must Ben get on his final lap for his average lap time to be 32.6? 


A. 
33 
B. 
31 


C. 
32 
D. 
32.6 


Hint 


