condition mean min max ZT0-3 475.750736 475.750736 475.750736 ZT4-7 293.047495 293.047495 293.047495 ZT8-11 351.8898205 351.8898205 351.8898205 ZT12-15 372.3613045 372.3613045 372.3613045 ZT16-19 555.4339405000001 555.4339405000001 555.4339405000001 ZT20-23 387.45725949999996 387.45725949999996 387.45725949999996