condition mean min max ZT0-3 37.5812 37.37075 37.791650000000004 ZT4-7 33.589749999999995 33.589749999999995 33.589749999999995 ZT8-11 30.418349999999997 30.418349999999997 30.418349999999997 ZT12-15 0 0 0 ZT16-19 28.7132 28.7132 28.7132 ZT20-23 34.8469 34.8469 34.8469