condition mean min max ZT0-3 5929.408188 5929.408188 5929.408188 ZT4-7 3794.4510520000003 3794.4510520000003 3794.4510520000003 ZT8-11 1973.9962185 1973.9962185 1973.9962185 ZT12-15 1215.775346 1215.775346 1215.775346 ZT16-19 2080.8179474999997 2080.8179474999997 2080.8179474999997 ZT20-23 2413.5180285 2413.5180285 2413.5180285