Supposed that a school bus, on the average, arrives at a particular bus stop at 8:30 am.
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Question:
Supposed that a school bus, on the average, arrives at a particular bus stop at 8:30 am. However, as a statistics class project, actual times of arrival were recorded for a period of one semester. The students found that the bus arrival time has a standard deviation of 5 minutes. Given these data:
a. About what are the chances that the bus will arrive at 8:32 a.m. or later on any particular day?
b. Find the approximate probability that the average arrival time for a two-month period in which the bus comes 25 times is between 8:29 and 8:31 am.
Related Book For
Cost management a strategic approach
ISBN: 978-0073526942
5th edition
Authors: Edward J. Blocher, David E. Stout, Gary Cokins
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