condition mean min max ZT0-3 5.010715 5.010715 5.010715 ZT4-7 17.366 17.366 17.366 ZT8-11 2.373855 2.373855 2.373855 ZT12-15 0.0 0.0 0.0 ZT16-19 24.78865 24.78865 24.78865 ZT20-23 36.845349999999996 36.845349999999996 36.845349999999996