For a question on the AP Economics Exam, the time to completion is a normally distributed...
For a question on the AP Economics Exam, the time to completion is a normally distributed random variable with a mean of 16.20 seconds and a variance of 0.2704 seconds. Find the probabilities that the time to completion will be
a. at least 17 seconds; b. (4 pts) at most 16 seconds; and, c. (4 pts) anywhere from 16 to 17 seconds.
Homework Answers
Here it is given that 
a. Now we need to find 
As distribution is normal we can convert x to z
b. Now we need to find 
As distribution is normal we can convert x to z
c. Now we need to find 
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For a question on the AP Economics Exam, the time to completion
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