condition mean min max ZT0-3 2.42489 2.10037 2.74941 ZT4-7 0.344937 0.344937 0.344937 ZT8-11 0.692255 0.692255 0.692255 ZT12-15 0 0 0 ZT16-19 1.7207249999999998 1.7207249999999998 1.7207249999999998 ZT20-23 0.3474665 0.3474665 0.3474665