condition mean min max ZT0-3 27.0002 27.0002 27.0002 ZT4-7 25.428449999999998 25.428449999999998 25.428449999999998 ZT8-11 23.5701 23.5701 23.5701 ZT12-15 23.7124 23.7124 23.7124 ZT16-19 22.3581 22.3581 22.3581 ZT20-23 28.2131 28.2131 28.2131