condition mean min max ZT0-3 14.34465 14.018899999999999 14.6704 ZT4-7 11.4209 11.4209 11.4209 ZT8-11 16.41275 16.41275 16.41275 ZT12-15 0 0 0 ZT16-19 26.860999999999997 26.860999999999997 26.860999999999997 ZT20-23 18.15635 18.15635 18.15635