A study finds that students who graduated from college in 2015 owed an average of $25,250 in
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A study finds that students who graduated from college in 2015 owed an average of $25,250 in student loans. An economist wants to determine if average debt has changed. She takes a sample of 40 recent graduates and finds that their average debt was $27,500 with a standard deviation of $9,120. Use the 90% confidence interval to determine if average debt has changed.
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Related Book For
Business Statistics Communicating With Numbers
ISBN: 9781260716306
4th Edition
Authors: Sanjiv Jaggia, Alison Kelly
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