condition mean min max ZT0-3 0.463087 0.463087 0.463087 ZT4-7 0.1182475 0.1182475 0.1182475 ZT8-11 0.627175 0.627175 0.627175 ZT12-15 0.24116949999999998 0.24116949999999998 0.24116949999999998 ZT16-19 0.247221 0.247221 0.247221 ZT20-23 0.9600709999999999 0.9600709999999999 0.9600709999999999