condition mean min max ZT0-3 112.234371 112.234371 112.234371 ZT4-7 163.17342150000002 163.17342150000002 163.17342150000002 ZT8-11 223.33477599999998 223.33477599999998 223.33477599999998 ZT12-15 223.46443349999998 223.46443349999998 223.46443349999998 ZT16-19 471.681735 471.681735 471.681735 ZT20-23 395.1806065 395.1806065 395.1806065