condition mean min max ZT0-3 184.85 184.85 184.85 ZT4-7 112.2 112.2 112.2 ZT8-11 155.6 155.6 155.6 ZT12-15 120.9 120.9 120.9 ZT16-19 244.7 244.7 244.7 ZT20-23 225.75 225.75 225.75