

1. 
For a set of data organized in a frequency distribution, the upper and lower values in each interval are called ______. 


A. 
class marks 
B. 
the class range 


C. 
class limits 
D. 
class intervals 


Hint 


2. 
What is the value of n so that the mean of {n, 3n  1, 3n, 3n + 1} is 10? 


A. 
2 
B. 
6 


C. 
7 
D. 
4 


Hint 


3. 
The second quartile point is also called the ______. 


A. 
mode 
B. 
range 


C. 
mean 
D. 
median 


Hint 


4. 



A. 
both the size of the sample and the population 
B. 
none of these 


C. 
the size of the population 
D. 
the size of the sample 


Hint 


5. 
The set of data below shows the number of candles sold for each day of a school fundraiser. Name the interval that describes the most candles sold. 4, 19, 28, 33, 26, 8, 14, 18, 21, 35, 36, 11, 25, 11,13, 44 


A. 
20–30 
B. 
0–10 


C. 
30–40 
D. 
10–20 


Hint 


6. 
Find the value of x so that the median of {4, 9, 6, 4, 4, 10, 5, x, 8, 9} is 6.5. 


A. 
6 
B. 
8 


C. 
5 
D. 
7 


Hint 


7. 
Find the interquartile range of the set of data below. 20, 15, 23, 14, 18, 12, 25, 10, 24, 12, 17 


A. 
11 
B. 
5 


C. 
9 
D. 
15 


Hint 


8. 
Find the upper and lower limits of an interval about the mean within which 87% of the values of a set of normally distributed data can be found if and Use the table below to help you. 





A. 
45.5–84.5 
B. 
40–80 


C. 
44.2–85.8 
D. 
52–78 


Hint 


9. 
The mean of a set of normally distributed data is 65 and the standard deviation is 13. What percent of the data is between 26 and 104? 


A. 
88.60% 
B. 
99.70% 


C. 
68.30% 
D. 
95.50% 


Hint 


10. 
The mean attendance of a sample of 1,000 high school girl's softball games in the county is 760, with a standard deviation of 77. Determine an attendance interval about the sample mean that has a 5% level of confidence. Use the table below to help you. 





A. 
753–767 
B. 
756–770 


C. 
754–766 
D. 
755–765 


Hint 

