condition mean min max ZT0-3 14.200199999999999 13.08845 15.31195 ZT4-7 13.18225 13.18225 13.18225 ZT8-11 13.22605 13.22605 13.22605 ZT12-15 0 0 0 ZT16-19 15.73035 15.73035 15.73035 ZT20-23 15.519400000000001 15.519400000000001 15.519400000000001