

1. 
Use the partial table below to find the limit above which 90% of the data lies if the mean is 30.5 and the standard deviation is 13.8. Assume the data are normally distributed. 





A. 
22.22 
B. 
12.56 


C. 
16.7 
D. 
23.6 


Hint 


2. 
What is the total area under the normal curve and above the horizontal axis? 


A. 
1 
B. 



C. 
10 
D. 
0 


Hint 


3. 
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. 
95.50% 
B. 
68.30% 


C. 
88.60% 
D. 
99.70% 


Hint 


4. 
The mean of a set of normally distributed data is 65 and the standard deviation is 13. Using the partial table below, what percent of the data is between 40 and 56? 





A. 
30.50% 
B. 
21.40% 


C. 
42.70% 
D. 
26.80% 


Hint 


5. 
The mean of a set of normally distributed data is 65 and the standard deviation is 13. Find the value that defines the 75th percentile. 


A. 
72.6 
B. 
75 


C. 
74.1 
D. 
75.8 


Hint 

