condition mean min max ZT0-3 200.7 200.7 200.7 ZT4-7 113.0 113.0 113.0 ZT8-11 69.85 69.85 69.85 ZT12-15 127.15 127.15 127.15 ZT16-19 199.3 199.3 199.3 ZT20-23 320.55 320.55 320.55