condition mean min max ZT0-3 195.2 195.2 195.2 ZT4-7 328.0 328.0 328.0 ZT8-11 249.8 249.8 249.8 ZT12-15 239.5 239.5 239.5 ZT16-19 242.5 242.5 242.5 ZT20-23 249.05 249.05 249.05