condition mean min max ZT0-3 1.39527 0.9586699999999999 1.83187 ZT4-7 0.1868705 0.1868705 0.1868705 ZT8-11 0.338895 0.338895 0.338895 ZT12-15 0 0 0 ZT16-19 0.6208365 0.6208365 0.6208365 ZT20-23 0.36499899999999996 0.36499899999999996 0.36499899999999996