In a random sample of 25 people, the mean commute time to work was 30.8 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval for the population mean . What is the margin of error of ? Interpret the results.

The confidence interval for the population mean is ( ____ , _____ ) (Round to one decimal place as needed.)