condition mean min max ZT0-3 0.29941145 0.1509339 0.447889 ZT4-7 0.4958635 0.4958635 0.4958635 ZT8-11 0.149259 0.149259 0.149259 ZT12-15 0 0 0 ZT16-19 0.594583 0.594583 0.594583 ZT20-23 0.7451145 0.7451145 0.7451145