condition mean min max ZT0-3 0.8177155 0.435794 1.2113195 ZT4-7 3.87447 3.87447 3.87447 ZT8-11 0.80174 0.80174 0.80174 ZT12-15 1.4932642500000002 0.4344835 2.552045 ZT16-19 1.506417 1.506417 1.506417 ZT20-23 6.48668 6.48668 6.48668