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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 408 Weeks Ago, 1 Day Ago |
| Questions Answered: | 66690 |
| Tutorials Posted: | 66688 |
MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
A sample of 40 speedometers of a particular type is selected, and each speedometer is calibrated for accuracy at 55 mph, resulting in a sample mean and sample standard deviation of 53.87 and 1.36, respectively. Does this data suggest that the true average reading when speed is 55 mph is in fact something other than 55? State the relevant hypotheses, calculate the value of the appropriate z statistic, determine the P-value, and state the conclusion for a significance level of .01.
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