condition mean min max ZT0-3 192.75 192.75 192.75 ZT4-7 298.2 298.2 298.2 ZT8-11 247.85000000000002 247.85000000000002 247.85000000000002 ZT12-15 303.6 303.6 303.6 ZT16-19 242.8 242.8 242.8 ZT20-23 216.15 216.15 216.15