condition mean min max ZT0-3 1241.494119 1241.494119 1241.494119 ZT4-7 543.98113 543.98113 543.98113 ZT8-11 476.445433 476.445433 476.445433 ZT12-15 770.1832684999999 770.1832684999999 770.1832684999999 ZT16-19 1939.47174 1939.47174 1939.47174 ZT20-23 4225.2117355 4225.2117355 4225.2117355