condition mean min max ZT0-3 59.340011 59.340011 59.340011 ZT4-7 65.3904525 65.3904525 65.3904525 ZT8-11 145.704114 145.704114 145.704114 ZT12-15 190.830802 190.830802 190.830802 ZT16-19 410.43350250000003 410.43350250000003 410.43350250000003 ZT20-23 601.489183 601.489183 601.489183