condition mean min max ZT0-3 0.89078925 0.7697805 1.011798 ZT4-7 1.2860999999999998 1.2860999999999998 1.2860999999999998 ZT8-11 1.456515 1.456515 1.456515 ZT12-15 0 0 0 ZT16-19 1.850355 1.850355 1.850355 ZT20-23 1.774155 1.774155 1.774155