Recent data from a national survey indicated that the average woman goes to a hair salon once
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Question:
Recent data from a national survey indicated that the average woman goes to a hair salon once every five weeks and spend on average $56 40. A sample of 80 women yielded a sample standard deviation of $12. Use this data to construct a 99% confidence interval for the average amount spent at a hair salon by this sample.
Related Book For
Business Statistics
ISBN: 978-0321925831
3rd edition
Authors: Norean Sharpe, Richard Veaux, Paul Velleman
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