condition mean min max ZT0-3 4.523937500000001 3.842225 5.20565 ZT4-7 0.293732 0.293732 0.293732 ZT8-11 0.5177925 0.5177925 0.5177925 ZT12-15 0 0 0 ZT16-19 6.34598 6.34598 6.34598 ZT20-23 0.5789975 0.5789975 0.5789975