condition mean min max ZT0-3 0.421084 0.421084 0.421084 ZT4-7 0.1682705 0.1682705 0.1682705 ZT8-11 0.0 0.0 0.0 ZT12-15 0.2780125 0.2780125 0.2780125 ZT16-19 0.8098825 0.8098825 0.8098825 ZT20-23 0.8027789999999999 0.8027789999999999 0.8027789999999999