condition mean min max ZT0-3 713.446702 713.446702 713.446702 ZT4-7 1172.0105015 1172.0105015 1172.0105015 ZT8-11 1075.0465605 1075.0465605 1075.0465605 ZT12-15 1123.99003 1123.99003 1123.99003 ZT16-19 1119.0541685 1119.0541685 1119.0541685 ZT20-23 881.5596065 881.5596065 881.5596065