Question: The Wall Street Journal reported that the average assembly time for the Ford Taurus is approximately 38 hours. Recently a modification in the assembly procedure

The Wall Street Journal reported that the average assembly time for the Ford Taurus is approximately 38 hours. Recently a modification in the assembly procedure has been made in hopes to reduce the average assembly time of the Taurus. A sample of 47 vehicles finds that the average assembly time is 37.5 hours. Experience with the new assembly method indicates that Is there evidence that the new method reduced the assembly time on average? What type of procedure is appropriate for this scenario and why?

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