condition mean min max ZT0-3 7.0876174569999995 7.062467208999999 7.1127677049999996 ZT4-7 3.66999489975 3.4480186205 3.891971179 ZT8-11 2.79053400575 2.6504181835000002 2.930649828 ZT12-15 2.9257766875 1.9895534609999999 3.861999914 ZT16-19 3.85800778825 3.361054137 4.3549614395 ZT20-23 5.292499505 5.1488096105 5.4361893995