condition mean min max ZT0-3 13.862175 12.282 15.442350000000001 ZT4-7 13.5334 13.5334 13.5334 ZT8-11 16.6529 16.6529 16.6529 ZT12-15 0 0 0 ZT16-19 19.03185 19.03185 19.03185 ZT20-23 14.71275 14.71275 14.71275