condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.309212 0.309212 0.309212 ZT8-11 0.11358766666666666 0.11358766666666666 0.11358766666666666 ZT12-15 0.0 0.0 0.0 ZT16-19 0.13025499999999998 0.13025499999999998 0.13025499999999998 ZT20-23 0.29424500000000003 0.29424500000000003 0.29424500000000003