condition mean min max ZT0-3 15.753900000000002 13.161000000000001 18.3468 ZT4-7 7.599985 7.599985 7.599985 ZT8-11 8.610289999999999 8.610289999999999 8.610289999999999 ZT12-15 0 0 0 ZT16-19 19.4085 19.4085 19.4085 ZT20-23 13.47365 13.47365 13.47365