condition mean min max ZT0-3 77.425725 73.21895 81.6325 ZT4-7 100.4023 100.4023 100.4023 ZT8-11 97.9331 97.9331 97.9331 ZT12-15 0 0 0 ZT16-19 106.809 106.809 106.809 ZT20-23 91.24945 91.24945 91.24945