condition mean min max ZT0-3 42.225054 42.225054 42.225054 ZT4-7 43.957246 43.957246 43.957246 ZT8-11 48.869823999999994 48.869823999999994 48.869823999999994 ZT12-15 40.755614 40.755614 40.755614 ZT16-19 46.909592 46.909592 46.909592 ZT20-23 42.949726999999996 42.949726999999996 42.949726999999996