condition mean min max ZT0-3 366.1 366.1 366.1 ZT4-7 155.7 155.7 155.7 ZT8-11 142.0 142.0 142.0 ZT12-15 260.3 260.3 260.3 ZT16-19 262.85 262.85 262.85 ZT20-23 302.05 302.05 302.05