A commonly cited standard for one-way length (duration) of school bus rides for elementary school children is 30 minutes. A local government office in a rural area randomly samples 100 elementary school children in their district and find an average one-way commute time of 38 minutes with a standard deviation of 8 minutes. A 95% confidence interval calculated based on this sample is (36.4, 39.6). Which of the following is the correct interpretation of this interval?