condition mean min max ZT0-3 8.948263 8.948263 8.948263 ZT4-7 10.656843 10.656843 10.656843 ZT8-11 11.043084499999999 11.043084499999999 11.043084499999999 ZT12-15 10.437852 10.437852 10.437852 ZT16-19 11.194331 11.194331 11.194331 ZT20-23 10.240019499999999 10.240019499999999 10.240019499999999