condition mean min max ZT0-3 160.44913333333332 108.7144 190.5385 ZT4-7 60.84985 60.84985 60.84985 ZT8-11 72.43445 72.43445 72.43445 ZT12-15 174.13869999999997 96.1034 252.17399999999998 ZT16-19 234.17849999999999 234.17849999999999 234.17849999999999 ZT20-23 160.743 160.743 160.743