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Suppose you record how long it takes you to get to school over many months and...

Suppose you record how long it takes you to get to school over many months and discover that the one-way travel times (including time to find parking and walk to your classroom), in minutes, are approximately normally distributed with a mean of 23.88 minutes and standard deviation of 4 minutes.

If your first class starts at 10am and you leave at 9:30am, what is the probability that you will be late for class? (Make sure to draw a picture for this one.)

If your first class starts at 10am, what is the latest time you should leave everyday so that you are on time at least 90% of the time?

Math   Statistics-And-Probability   
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(i)

(ii)

Ans : 9.41 am

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