condition mean min max ZT0-3 37.402158 37.402158 37.402158 ZT4-7 51.440179 51.440179 51.440179 ZT8-11 44.413181 44.413181 44.413181 ZT12-15 54.225648 54.225648 54.225648 ZT16-19 43.654317 43.654317 43.654317 ZT20-23 38.094201 38.094201 38.094201