FBI Report: Larceny Thirty small communities in Connecticut (population near 10,000 each) gave an average of = 138.5 reported cases of larceny per year. Assume that o is known to be 42.6 cases per year (Reference: Crim in the United States, Federal Bureau of Investigation). 87% (a) Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? 92% (b) Find a 95% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error?

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