condition mean min max ZT0-3 29.161949999999997 29.161949999999997 29.161949999999997 ZT4-7 27.44865 27.44865 27.44865 ZT8-11 25.60585 25.60585 25.60585 ZT12-15 27.43125 27.43125 27.43125 ZT16-19 30.805999999999997 30.805999999999997 30.805999999999997 ZT20-23 27.042949999999998 27.042949999999998 27.042949999999998