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A fast food outlet claims that the mean waiting time in line is less than 3.7 minutes. A random sample of 20 customers has a

A fast food outlet claims that the mean waiting time in line is less than 3.7 minutes. A random sample of 20 customers has a mean of 3.5 minutes with a standard deviation of 0.8 minutes. Use a significance level of 0.05 to test whether the fast foodoutlet's claim is supported or not supported.

not supported

supported

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