condition mean min max ZT0-3 188.34406666666666 70.10735 400.0115 ZT4-7 498.0815 498.0815 498.0815 ZT8-11 450.8025 450.8025 450.8025 ZT12-15 117.7927 79.0344 156.551 ZT16-19 64.97105 64.97105 64.97105 ZT20-23 64.52154999999999 64.52154999999999 64.52154999999999