SAT Probability and conditional probability Question

A machine fills bags with approximately 15 ounces of sugar. To test the accuracy of the filling process, 343 bags of sugar were selected at random and weighed. Based on the sample, it is estimated that the average weight of all bags of sugar filled by the machine in an 8-hour period is 14.88 ounces, with an associated margin of error of 0.19 ounce. Which of the following is the best interpretation of this estimate?