condition mean min max ZT0-3 46.281846 46.281846 46.281846 ZT4-7 46.972451 46.972451 46.972451 ZT8-11 39.598716499999995 39.598716499999995 39.598716499999995 ZT12-15 32.362923 32.362923 32.362923 ZT16-19 57.4766105 57.4766105 57.4766105 ZT20-23 49.489216 49.489216 49.489216