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A fast food restaurant says that their mean waiting time in line is 3.5 minutes. A random sample of 20 customers has a mean of

A fast food restaurant says that their mean waiting time in line is 3.5 minutes. A random sample of 20 customers has a mean of 3.2 minutes with a standard deviation of 0.8 minute. Assume the population is normally distributed. At level of significance = 0.05, test the restaurant's claim

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Principles of economics

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978-0538453042

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