Refer to the data given in the file P2_11.XLS. Consider the average time (in minutes) it takes
Question:
Refer to the data given in the file P2_11.XLS. Consider the average time (in minutes) it takes a citizen of each metropolitan area to travel to work and back home each day.
a. Find are liable measure of the dispersion of these average commute times around the overall sample mean.
b. Between what two numbers can we be approximately 99.7% sure that any one of these average travel times will fall?
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Related Book For 
Managerial Statistics
ISBN: 9780534389314
1st Edition
Authors: S. Christian Albright, Wayne L. Winston, Christopher Zappe
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