condition mean min max ZT0-3 1.5150416666666666 0.0 3.42156 ZT4-7 1.11205 1.11205 1.11205 ZT8-11 1.125995 1.125995 1.125995 ZT12-15 1.16214 1.09922 1.22506 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0