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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
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FBI Report: Larceny Thirty small communities in Connecticut (population near 10,000 each) gave an average of x = 138.5 reported cases of larceny per year. Assume that s is known to be 42.6 cases per year (Reference: Crime in the United States, Federal Bureau of Investigation).
(a)Â Â Â Â Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error?
(b)Â Â Â Find a 95% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error?
(c)Â Â Â Â Find a 99% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error?
(d)Â Â Â Compare the margins of error for parts (a) through (c). As the confidence levels increase, do the margins of error increase?
(e)Â Â Â Â Critical Thinking: Compare the lengths of the confidence intervals for parts
(a)Â Â through (c). As the confidence levels increase, do the confidence intervals increase in length?
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