Data was collected for 40 randomly selected trees growing in the median strip of a busy freeway. The height of each tree (in inches) was recorded. Data was recorded to the nearest whole inch. The data is summarized in the histogram below. 6 Frequency 4 2 15 20 25 30 35 40 45 50 55 height (in) Q What is the minimum possible tree height for the data recorded for this histogram? Note: Each class contains its lower class boundary, but not its upper class boundary. minimum =