1.
Suppose that a random sample of size 36 is to be selected from a population with mean 49 and standard deviation 9. What is the approximate probability that will be within 0.5 of the population mean?
a. 
0.5222 

b. 
0.0443 

c. 
0.2611 

d. 
0.4611 

e. 
0.7389 
2.
Suppose that x is normally distributed with a mean of 60 and a standard deviation of 9. What is P(x 68.73)?
a. 
0.834 

b. 
0.166 

c. 
0.157 

d. 
0.334 

e. 
0.170 
Get Answers For Free
Most questions answered within 1 hours.