condition mean min max ZT0-3 19.969784054999998 14.89638853 25.04317958 ZT4-7 24.4269165625 16.06173613 32.792096995 ZT8-11 80.06839667999999 63.756272975 96.38052038499998 ZT12-15 72.55549213500001 62.0976969 83.01328737 ZT16-19 44.15986076 42.24365594 46.076065580000005 ZT20-23 40.554778105 40.36213067 40.74742554