

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


A. 
1 
B. 
9 


C. 
9.4 
D. 
8 


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. 
97 
B. 
100 


C. 
80 
D. 
93 


Hint 


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


A. 
arithmetic average 
B. 
highest number 


C. 
most frequent 
D. 
middle number 


Hint 


4. 
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. 
31 
B. 
32 


C. 
32.6 
D. 
33 


Hint 


5. 
The median is the __________ of a set of numbers. 


A. 
most frequent number 
B. 
middle number 


C. 
highest number 
D. 
arithmetic average 


Hint 


