condition mean min max ZT0-3 23.0495479875 20.905489035 25.19360694 ZT4-7 10.37182487025 9.771358615499999 10.972291125000002 ZT8-11 13.540897045000001 11.464682995 15.617111095 ZT12-15 10.22930514175 9.666658823 10.7919514605 ZT16-19 11.052968867250001 9.7688642995 12.337073435 ZT20-23 12.5878610775 11.642902294999999 13.53281986