Final answer:
The mean represents the average weight of the parts produced, while the standard deviation measures the variability of the weights around the mean.
Step-by-step explanation:
In the context of the weight specifications for a part on a 3-D printer, the manufacturing process's mean refers to the average weight of the parts produced. It can be calculated by summing up the weights of all the parts and dividing it by the total number of parts. The standard deviation, on the other hand, measures the variability or spread of the weights around the mean. A smaller standard deviation indicates that the weights are closer to the mean, while a larger standard deviation suggests greater variability.