condition mean min max ZT0-3 0.5551736242499999 0.466981122 0.6433661264999999 ZT4-7 0.932927077 0.7649249165 1.1009292375 ZT8-11 0.740466587 0.5909439105 0.8899892635 ZT12-15 0.70333343825 0.5911111745000001 0.815555702 ZT16-19 0.3507925085 0.3476778135 0.35390720350000004 ZT20-23 0.21203369825 0.204651103 0.21941629350000003