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A fast food outlet claims that the mean waiting time in line is less than 2.4 minutes. A random sample of 50 customers has a

A fast food outlet claims that the mean waiting time in line is less than 2.4 minutes. A random sample of 50 customers has a mean of 2.31 minutes with a standard deviation of 0.4 minute. If = 0.05, test the fast food outlet's claim.

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