condition mean min max ZT0-3 14.298100000000002 14.298100000000002 14.298100000000002 ZT4-7 24.402749999999997 24.402749999999997 24.402749999999997 ZT8-11 8.60566 8.60566 8.60566 ZT12-15 4.332545 4.332545 4.332545 ZT16-19 5.84165 5.84165 5.84165 ZT20-23 9.32077 9.32077 9.32077