condition mean min max ZT0-3 0.52083825 0.351071 0.6906055 ZT4-7 0.3536455 0.3536455 0.3536455 ZT8-11 0.939041 0.939041 0.939041 ZT12-15 0 0 0 ZT16-19 2.071635 2.071635 2.071635 ZT20-23 0.8092090000000001 0.8092090000000001 0.8092090000000001