condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.012453494 0.0 0.024906988 ZT12-15 0.025241127666666665 0.025173933 0.02530832233333333 ZT16-19 0.011913511500000001 0.0 0.023827023000000003 ZT20-23 0.0 0.0 0.0