condition mean min max ZT0-3 4.5596250000000005 4.5596250000000005 4.5596250000000005 ZT4-7 4.51534 4.51534 4.51534 ZT8-11 1.634775 1.634775 1.634775 ZT12-15 1.425475 1.425475 1.425475 ZT16-19 3.40275 3.40275 3.40275 ZT20-23 3.124495 3.124495 3.124495