condition mean min max ZT0-3 14.7551637975 12.48928373 17.021043865 ZT4-7 14.232435351000001 14.153842305000001 14.311028397000001 ZT8-11 25.2878052 19.390159755 31.185450645 ZT12-15 30.709325549999996 28.127023214999998 33.291627885 ZT16-19 24.359143862499998 23.199101485 25.51918624 ZT20-23 23.1080474475 21.512193064999998 24.70390183