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?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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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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