condition mean min max ZT0-3 2.164765 1.83324 2.49629 ZT4-7 0.9274720000000001 0.9274720000000001 0.9274720000000001 ZT8-11 1.2873700000000001 1.2873700000000001 1.2873700000000001 ZT12-15 0 0 0 ZT16-19 1.613165 1.613165 1.613165 ZT20-23 1.9734099999999999 1.9734099999999999 1.9734099999999999