Last month, a large national banks average payment time was 33 days with a standard deviation of
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Build a 95% confidence interval on the difference between this month€™s and last month€™s payment times. Is there evidence that payment times are increasing?
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Related Book For
Managing Controlling and Improving Quality
ISBN: 978-0471697916
1st edition
Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund
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