Suppose a random sample of 30 college students reveals that the mean amount of money spent on
Question:
Suppose a random sample of 30 college students reveals that the mean amount of money spent on textbooks each semester is $ 145 with a standard deviation of $25. Construct a 90 % confidence interval for the mean amount of money that students spend on textbooks each semester.
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Related Book For 
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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