condition mean min max ZT0-3 45.7736 45.7736 45.7736 ZT4-7 24.8405 24.8405 24.8405 ZT8-11 23.67385 23.67385 23.67385 ZT12-15 29.11065 29.11065 29.11065 ZT16-19 52.348200000000006 52.348200000000006 52.348200000000006 ZT20-23 47.66185 47.66185 47.66185