condition mean min max ZT0-3 19.58425 18.1402 21.0283 ZT4-7 24.4736 24.4736 24.4736 ZT8-11 30.5259 30.5259 30.5259 ZT12-15 32.726975 31.019750000000002 34.434200000000004 ZT16-19 26.401233333333334 22.7472 30.055266666666668 ZT20-23 0 0 0