condition mean min max ZT0-3 25.280250000000002 21.607950000000002 28.952550000000002 ZT4-7 43.10065 43.10065 43.10065 ZT8-11 37.9467 37.9467 37.9467 ZT12-15 0 0 0 ZT16-19 48.88505 48.88505 48.88505 ZT20-23 50.4679 50.4679 50.4679