The credit manager of a discount department store believes that the average age of his charge account
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Question:
The credit manager of a discount department store believes that the average age of his charge account customers is less than 40 years. A random sample of 100 charge account customers revealed an average age of 36 years and a standard deviation of 10 years. Do these data provide sufficient evidence to support the credit manager's belief?
Related Book For
Business Statistics in Practice
ISBN: 978-0077404741
6th edition
Authors: Bruce Bowerman, Richard O'Connell
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