condition mean min max ZT0-3 60.223274 60.223274 60.223274 ZT4-7 212.4860275 212.4860275 212.4860275 ZT8-11 253.15749250000002 253.15749250000002 253.15749250000002 ZT12-15 175.5749505 175.5749505 175.5749505 ZT16-19 129.2727215 129.2727215 129.2727215 ZT20-23 120.757772 120.757772 120.757772