condition mean min max ZT0-3 16.7521 15.38955 18.114649999999997 ZT4-7 12.67885 12.67885 12.67885 ZT8-11 17.093049999999998 17.093049999999998 17.093049999999998 ZT12-15 0 0 0 ZT16-19 19.57205 19.57205 19.57205 ZT20-23 13.426 13.426 13.426