condition mean min max ZT0-3 0.0618402 0.0618402 0.0618402 ZT4-7 0.08865055 0.08865055 0.08865055 ZT8-11 0.041317 0.041317 0.041317 ZT12-15 0.02523055 0.02523055 0.02523055 ZT16-19 0.0 0.0 0.0 ZT20-23 0.02190785 0.02190785 0.02190785