Final answer:
Jason should focus on the accuracy and precision of the bottling process, possibly using a graduated cylinder, to ensure each bottle is correctly filled.
Step-by-step explanation:
Jason should use the concepts of accuracy and precision to understand and control the variation in the water bottles. These phenomena are critical in quality control processes, where measuring instruments or methods need to yield results that are as close as possible to the true value (accuracy) and consistently produce the same results under unchanged conditions (precision). Since the bottles vary by around five milliliters, which is a small unit of volume, using tools like a graduated cylinder can help in ensuring that each bottle is filled with precisely one liter of water.