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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.

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Answer #1

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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