condition mean min max ZT0-3 38.239025 31.2273 45.25075 ZT4-7 54.53935 54.53935 54.53935 ZT8-11 53.6845 53.6845 53.6845 ZT12-15 0 0 0 ZT16-19 41.89215 41.89215 41.89215 ZT20-23 35.7642 35.7642 35.7642