condition mean min max ZT0-3 402.359392 402.359392 402.359392 ZT4-7 178.29611549999998 178.29611549999998 178.29611549999998 ZT8-11 239.36735299999998 239.36735299999998 239.36735299999998 ZT12-15 187.86911450000002 187.86911450000002 187.86911450000002 ZT16-19 342.906119 342.906119 342.906119 ZT20-23 529.7186355 529.7186355 529.7186355