Question: A manufacturer of chocolate chips suspects its bag-filling machine is malfunctioning. The machine is supposed to dispense (a mean of) 429 grams per bag. Based on a 12 bag sample s where the sample mean is 437 grams and sample standard deviation is 17 grams, is there sufficient evidence at the .05 level that the machine is broken? Perform an appropriate hypothesis test and express your answer in a way that even a manager might understand.