condition mean min max ZT0-3 0.14181016666666665 0.0 0.4254305 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.3805825 0.0 0.761165 ZT16-19 0.0 0.0 0.0 ZT20-23 0.411021 0.411021 0.411021