condition mean min max ZT0-3 2940.770518 2940.770518 2940.770518 ZT4-7 5659.9395700000005 5659.9395700000005 5659.9395700000005 ZT8-11 3977.5843685 3977.5843685 3977.5843685 ZT12-15 5960.0219725 5960.0219725 5960.0219725 ZT16-19 4224.1513175 4224.1513175 4224.1513175 ZT20-23 5244.3680755000005 5244.3680755000005 5244.3680755000005