condition mean min max ZT0-3 0.041407834 0.0 0.082815668 ZT4-7 0.15161599633333334 0.0 0.30323199266666667 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.029351478 0.0 0.058702956 ZT20-23 0.0 0.0 0.0