When building a contour density plot, the option "Number of Levels" is an option. How does JMP determine the contour lines based on this user input? For instance, do these levels correspond to specific quartiles, where if "2" is selected, one contour contains data bounded by the 25th and 75 quartile and the other contour contains data bounded by the 0-25th & 75-100th quartile? Any insight into the definition of these density contours would be appreciated.
