condition mean min max ZT0-3 861.580348 861.580348 861.580348 ZT4-7 360.98037500000004 360.98037500000004 360.98037500000004 ZT8-11 78.44163 78.44163 78.44163 ZT12-15 112.11694650000001 112.11694650000001 112.11694650000001 ZT16-19 471.49899 471.49899 471.49899 ZT20-23 1254.339176 1254.339176 1254.339176