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 0.024277901833333334 0.0 0.04855580366666667 ZT16-19 0.069033053 0.0 0.138066106 ZT20-23 0.0 0.0 0.0