condition mean min max ZT0-3 29.617749999999997 26.504849999999998 32.73065 ZT4-7 16.676499999999997 16.676499999999997 16.676499999999997 ZT8-11 26.48085 26.48085 26.48085 ZT12-15 0 0 0 ZT16-19 31.29565 31.29565 31.29565 ZT20-23 26.2907 26.2907 26.2907