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Tire Kingdom installs automobile tires on a first-come-first-served basis. A random sample of 40 customers experienced an...

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Statistics

Tire Kingdom installs automobile tires on afirst-come-first-served basis. A random sample of 40 customersexperienced an average wait time of 90.5 minutes. Assume that thestandard deviation of the total wait time for all customers is 20.6minutes. Determine the 90% confidence interval for this sample.

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