A beer supplier produces bottles advertised to contain 341 mL. A quality control technician suspects that, on average, the bottles are being overfilled. In order to test this suspicion, the technician takes a simple random sample of 24 bottles of beer and finds the mean volume to be 342.1 mL.

Assuming that the volume per bottle is normally distributed with a population standard deviation of 2 mL, is there evidence to support the technician's suspicion? Conduct a hypothesis test at = 0.01 using the critical value method.