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 0.008755825 0.0 0.01751165 ZT16-19 0.0071798166666666675 0.0 0.014359633333333335 ZT20-23 0 0 0