condition mean min max ZT0-3 0.33280583333333336 0.084408 0.5184975000000001 ZT4-7 0.165613 0.165613 0.165613 ZT8-11 0.21179900000000002 0.21179900000000002 0.21179900000000002 ZT12-15 0.30473574999999997 0.21531299999999998 0.39415849999999997 ZT16-19 0.32208000000000003 0.32208000000000003 0.32208000000000003 ZT20-23 0.36168049999999996 0.36168049999999996 0.36168049999999996