condition mean min max ZT0-3 418.2 418.2 418.2 ZT4-7 240.4 240.4 240.4 ZT8-11 220.95 220.95 220.95 ZT12-15 317.8 317.8 317.8 ZT16-19 409.1 409.1 409.1 ZT20-23 472.85 472.85 472.85