Residents of Hawaii have the longest life expectancies, averaging 81.3 years (travelandleisure.com, July 16, 2018). A sociologist
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Residents of Hawaii have the longest life expectancies, averaging 81.3 years (travelandleisure.com, July 16, 2018). A sociologist collects data on the age at death for 50 recently deceased Michigan residents. A portion of the data is shown in the accompanying table. Assume that the population standard deviation is 5 years.
a. Construct the 95% confidence interval for the mean life expectancy of all residents of Michigan.
b. Use the 95% confidence interval to determine if the mean life expectancy of Michigan residents differs from that of Hawaiian residents.
Age at Death |
76.4 |
76.0 |
76.7 |
75.9 |
79.5 |
83.3 |
77.1 |
82.1 |
66.3 |
73.5 |
79.9 |
78.2 |
82.2 |
81.1 |
81.7 |
71.6 |
77.0 |
71.9 |
84.2 |
68.2 |
80.8 |
77.2 |
73.6 |
78.7 |
82.8 |
82.1 |
75.0 |
87.0 |
75.6 |
73.3 |
82.8 |
79.3 |
75.3 |
87.0 |
85.0 |
73.9 |
77.2 |
74.0 |
80.3 |
82.3 |
79.5 |
81.2 |
81.9 |
80.0 |
84.9 |
76.2 |
74.9 |
80.4 |
82.8 |
73.6 |
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Related Book For
Business Statistics Communicating With Numbers
ISBN: 9781260716306
4th Edition
Authors: Sanjiv Jaggia, Alison Kelly
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