To determine which bus typically has the faster travel time, we need to compare the measures of center for each data set. Since the data sets are relatively small and do not appear to have any extreme outliers, we can use either the mean or median as the measure of center.
Looking at the two line plots, we can see that Bus 18 has more dots clustered around the lower end of the scale, while Bus 47 has more dots spread out across the entire range of values. This suggests that Bus 18 may have a faster typical travel time.
Calculating the median for each data set confirms this suspicion. For Bus 18, the median is 13, which means that half of the students have a travel time of 13 minutes or less, and half have a travel time of 13 minutes or more. For Bus 47, the median is 16, which means that half of the students have a travel time of 16 minutes or less, and half have a travel time of 16 minutes or more.
Therefore, we can conclude that Bus 18 typically has the faster travel time, with a median of 13 minutes.