condition mean min max ZT0-3 34.524578 34.524578 34.524578 ZT4-7 46.689080000000004 46.689080000000004 46.689080000000004 ZT8-11 91.2556575 91.2556575 91.2556575 ZT12-15 68.359289 68.359289 68.359289 ZT16-19 40.198715 40.198715 40.198715 ZT20-23 47.627803 47.627803 47.627803