condition mean min max ZT0-3 52.809078 52.809078 52.809078 ZT4-7 60.538539 60.538539 60.538539 ZT8-11 73.09969050000001 73.09969050000001 73.09969050000001 ZT12-15 91.6581815 91.6581815 91.6581815 ZT16-19 73.937523 73.937523 73.937523 ZT20-23 75.511594 75.511594 75.511594