condition mean min max ZT0-3 1.1156285 1.0095269999999998 1.22173 ZT4-7 2.21254 2.21254 2.21254 ZT8-11 1.14865 1.14865 1.14865 ZT12-15 0 0 0 ZT16-19 0.72092 0.72092 0.72092 ZT20-23 1.449933 1.449933 1.449933