condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.044183462500000006 0.04330622133333334 0.04506070366666667 ZT20-23 0.0 0.0 0.0