condition mean min max ZT0-3 191.64999999999998 191.64999999999998 191.64999999999998 ZT4-7 202.7 202.7 202.7 ZT8-11 228.1 228.1 228.1 ZT12-15 211.3 211.3 211.3 ZT16-19 221.95 221.95 221.95 ZT20-23 172.89999999999998 172.89999999999998 172.89999999999998