condition mean min max ZT0-3 20.0687 14.4759 25.6615 ZT4-7 29.4944 29.4944 29.4944 ZT8-11 4.64176 4.64176 4.64176 ZT12-15 0 0 0 ZT16-19 11.4808 11.4808 11.4808 ZT20-23 24.039700000000003 24.039700000000003 24.039700000000003