condition mean min max ZT0-3 10.675672 10.675672 10.675672 ZT4-7 11.360775499999999 11.360775499999999 11.360775499999999 ZT8-11 10.913087 10.913087 10.913087 ZT12-15 9.413600500000001 9.413600500000001 9.413600500000001 ZT16-19 11.65976 11.65976 11.65976 ZT20-23 10.837361 10.837361 10.837361