condition mean min max ZT0-3 0.010651366666666667 0.0 0.0319541 ZT4-7 0.0 0.0 0.0 ZT8-11 0.134391 0.134391 0.134391 ZT12-15 0.033930199999999994 0.03209325 0.03576715 ZT16-19 0.0630503 0.0630503 0.0630503 ZT20-23 0.03466 0.03466 0.03466