condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.023948794666666665 0.0 0.04789758933333333 ZT16-19 0.09534291299999999 0.0 0.19068582599999997 ZT20-23 0.0 0.0 0.0