condition mean min max ZT0-3 0.5518358333333333 0.329061 0.8232895 ZT4-7 0.1506195 0.1506195 0.1506195 ZT8-11 0.4369685 0.4369685 0.4369685 ZT12-15 0.5521695 0.5152395 0.5890995 ZT16-19 0.799212 0.799212 0.799212 ZT20-23 0.7373415 0.7373415 0.7373415