condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.077793 0.077793 0.077793 ZT12-15 0.04039516666666667 0.0 0.08079033333333334 ZT16-19 0.05935000000000001 0.0 0.11870000000000001 ZT20-23 0 0 0