condition mean min max ZT0-3 117.30000000000001 117.30000000000001 117.30000000000001 ZT4-7 90.7 90.7 90.7 ZT8-11 118.35 118.35 118.35 ZT12-15 141.45 141.45 141.45 ZT16-19 185.15 185.15 185.15 ZT20-23 204.8 204.8 204.8