condition mean min max ZT0-3 219.89999999999998 219.89999999999998 219.89999999999998 ZT4-7 143.2 143.2 143.2 ZT8-11 146.85000000000002 146.85000000000002 146.85000000000002 ZT12-15 173.85 173.85 173.85 ZT16-19 177.60000000000002 177.60000000000002 177.60000000000002 ZT20-23 221.15 221.15 221.15