

1. 
A 1% level of confidence is given when ______. 


A. 
P = 95% 
B. 
P = 99% 


C. 
P = 1% 
D. 
none of these 


Hint 


2. 



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 


3. 
From a population of 32 items, a sample of 25 items is chosen and found to have a standard deviation of 57.0. Find the standard error of the mean. 


A. 
11.4 
B. 
7.25 


C. 
2.28 
D. 
10.1 


Hint 


4. 
Use the partial table below. If = 57.0, N = 10, and = 147.9, find the interval about the sample mean that has a 5% level of confidence. 





A. 
about 112.58183.22 
B. 
about 99.91195.89 


C. 
about 101.41194.39 
D. 
about 118.17177.63 


Hint 


5. 
Use the partial table below. If = 6.4.0, N = 100, and = 37.1, find the interval about the sample mean that has a 1% level of confidence. 





A. 
about 36.0438.16 
B. 
about 35.8538.35 


C. 
about 35.4538.75 
D. 
about 35.1839.02 


Hint 

