condition mean min max ZT0-3 625.189116 625.189116 625.189116 ZT4-7 333.4412995 333.4412995 333.4412995 ZT8-11 613.5011509999999 613.5011509999999 613.5011509999999 ZT12-15 573.080019 573.080019 573.080019 ZT16-19 662.3478259999999 662.3478259999999 662.3478259999999 ZT20-23 425.17286850000005 425.17286850000005 425.17286850000005