a. Find a 95% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? b. Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? c. Compare the margins of error in parts ? and ?. What happened to the margin of error? Why?
a. Find a 95% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? b. Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? c. Compare the margins of error in parts ? and ?. What happened to the margin of error? Why?
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
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Question
Forty-five (45) small communities in the US state of Connecticut reported on average 140 cases
of larceny per year. Assume the population standard deviation is 43 cases per year.
a. Find a 95% confidence interval for the population
larceny cases in such communities. What is the margin of error?
b. Find a 90% confidence interval for the population mean annual number of reported
larceny cases in such communities. What is the margin of error?
c. Compare the margins of error in parts ? and ?. What happened to the margin of error?
Why?
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