condition mean min max ZT0-3 35.590675000000005 33.527 37.65435 ZT4-7 43.4381 43.4381 43.4381 ZT8-11 50.407650000000004 50.407650000000004 50.407650000000004 ZT12-15 0 0 0 ZT16-19 62.13545 62.13545 62.13545 ZT20-23 46.0612 46.0612 46.0612