condition mean min max ZT0-3 0.48944699999999997 0.48944699999999997 0.48944699999999997 ZT4-7 0.2685115 0.2685115 0.2685115 ZT8-11 0.1751115 0.1751115 0.1751115 ZT12-15 0.1242025 0.1242025 0.1242025 ZT16-19 0.360222 0.360222 0.360222 ZT20-23 0.3102775 0.3102775 0.3102775