condition mean min max ZT0-3 4343.75 4343.75 4343.75 ZT4-7 2716.4 2716.4 2716.4 ZT8-11 2476.1499999999996 2476.1499999999996 2476.1499999999996 ZT12-15 2608.75 2608.75 2608.75 ZT16-19 3238.1499999999996 3238.1499999999996 3238.1499999999996 ZT20-23 3575.75 3575.75 3575.75