condition mean min max ZT0-3 0.04219838858333333 0.0325226585 0.05187411866666666 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.022174716666666667 0.0 0.044349433333333334 ZT16-19 0.011913511500000001 0.0 0.023827023000000003 ZT20-23 0.0 0.0 0.0