condition mean min max ZT0-3 112.215917 112.215917 112.215917 ZT4-7 133.612773 133.612773 133.612773 ZT8-11 128.16263450000002 128.16263450000002 128.16263450000002 ZT12-15 129.316436 129.316436 129.316436 ZT16-19 181.381553 181.381553 181.381553 ZT20-23 162.1822205 162.1822205 162.1822205