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| Teaching Since: | May 2017 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Cracks in highway pavement. Using van-mounted stateof-the-art video technology, the Mississippi Department of Transportation collected data on the number of cracks (called crack intensity) in an undivided two-lane highway. (Journal of Infrastructure Systems, March 1995). The mean number of cracks found in a sample of eight 50-meter sections of the highway was
 = .210, with a variance of s2 = .011. Suppose the American Association of State Highway and Transportation Officials (AASHTO) recommends a maximum mean crack intensity of .100 for safety purposes.
a. Test the hypothesis that the true mean crack intensity of the Mississippi highway exceeds the AASHTO recommended maximum. Use a = .01.
b. Define a Type I error and a Type II error for this study.
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