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(Step-by-Step) A bus company advertised a mean time of 150 minutes for a trip between two cities. A consumer group had reason to believe that the mean time

Question: A bus company advertised a mean time of 150 minutes for a trip between two cities. A consumer group had reason to believe that the mean time was more than 150 minutes. A sample of 40 trips showed a mean $\bar{x}=153$ minutes and a standard deviation $s=7.5$ minutes. At the .05 level of significance, test the consumer group's belief.

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(Step-by-Step) A bus company advertised a mean time of 150 minutes for a trip between two cities. A consumer group had reason to believe that the mean time

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