condition mean min max ZT0-3 33.6865 33.6865 33.6865 ZT4-7 21.4022 21.4022 21.4022 ZT8-11 22.9081 22.9081 22.9081 ZT12-15 11.324100000000001 11.324100000000001 11.324100000000001 ZT16-19 26.24615 26.24615 26.24615 ZT20-23 29.3574 29.3574 29.3574