The manager of the local Hamburger Express wishes to estimate the mean time customers spend at the

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The manager of the local Hamburger Express wishes to estimate the mean time customers spend at the drive-through window. A sample of 20 customers experienced a mean waiting time of 2.65 minutes, with a standard deviation of 0.45 minute. Develop a 90% confidence interval for the mean waiting time.

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Statistical Techniques in Business and Economics

ISBN: 978-1259666360

17th edition

Authors: Douglas A. Lind, William G Marchal

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