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Show your work. 6. Hamburger Express wants to estimate the mean time customers spend at the drive-through window.A sample of 20 customers experienced a mean

Show your work.

6. Hamburger Express wants to estimate the mean time customers spend at the drive-through window.A sample of 20 customers experienced a mean wait time of 2.65 minutes, with a standard deviation of 0.45 minutes.Develop a 90% confidence interval for the mean wait time. [Remember: degrees of freedom.]

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