condition mean min max ZT0-3 222.1375 222.1375 222.1375 ZT4-7 211.85649999999998 211.85649999999998 211.85649999999998 ZT8-11 283.5485 283.5485 283.5485 ZT12-15 258.77549999999997 258.77549999999997 258.77549999999997 ZT16-19 307.224 307.224 307.224 ZT20-23 262.9625 262.9625 262.9625