condition mean min max ZT0-3 0.8233344999999999 0.58953 1.0571389999999998 ZT4-7 1.204895 1.204895 1.204895 ZT8-11 1.808365 1.808365 1.808365 ZT12-15 0 0 0 ZT16-19 0.8913599999999999 0.8913599999999999 0.8913599999999999 ZT20-23 1.343525 1.343525 1.343525