condition mean min max ZT0-3 3375.45 3375.45 3375.45 ZT4-7 2581.5 2581.5 2581.5 ZT8-11 2554.3 2554.3 2554.3 ZT12-15 2518.7 2518.7 2518.7 ZT16-19 2992.75 2992.75 2992.75 ZT20-23 3573.1499999999996 3573.1499999999996 3573.1499999999996