Burger Quick is able to estimate their wait time more consistently because it has a smaller interquartile range (IQR). The IQR is a measure of the spread of the middle 50% of the data, which is represented by the box in the box plot. A smaller IQR indicates that the data is more tightly clustered around the median, which in turn indicates that the wait times at Burger Quick are more consistent. The range, which is the difference between the maximum and minimum values in the data set, is not as informative as the IQR for comparing the consistency of the wait times, as it is influenced by outliers. Therefore, the correct answer is: Burger Quick, because it has a smaller IQR.