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An officer states that the average fine levied by the safety office against companies is at most $200. A company owner suspects it is higher.
An officer states that the average fine levied by the safety office against companies is at most $200. A company owner suspects it is higher. She samples 10 companies and finds that the average is $210. The standard deviation of the sample is 16. Test the claim that the average is higher than $200. At α = 0.05, which of the following is true?