condition mean min max ZT0-3 0.49733895400000006 0.22567648199999998 0.7690014260000001 ZT4-7 1.455709106 1.239268322 1.67214989 ZT8-11 1.9071636685 1.6619928755 2.1523344615 ZT12-15 5.51299086 3.8279194629999997 7.198062257 ZT16-19 7.3165754395 6.5110911215 8.1220597575 ZT20-23 9.84229511525 9.431670802500001 10.252919428