condition mean min max ZT0-3 81.87010000000001 81.87010000000001 81.87010000000001 ZT4-7 50.466899999999995 50.466899999999995 50.466899999999995 ZT8-11 39.7692 39.7692 39.7692 ZT12-15 24.87595 24.87595 24.87595 ZT16-19 62.3112 62.3112 62.3112 ZT20-23 78.4119 78.4119 78.4119