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Normal Distribution

On average, your department ships an order two hours after it is received. The distribution of times is approximately normal, the standard deviation is 15 mins. -today you handled 120 orders (empirical rule)a. how many orders would you expect to be shipped :
within 2 hours of being received --b. within 1 hour 30 mins

How many orders would you expect to NOT BE shipped after 2 hrs 30 mins.


Solution Preview

Mean = 2 hours

Std Deviation = 15 mins or .25 hours

No of orders handled = 120

a) Number of orders shipped ...