condition mean min max ZT0-3 35.674625000000006 31.963900000000002 39.38535 ZT4-7 18.613799999999998 18.613799999999998 18.613799999999998 ZT8-11 20.4752 20.4752 20.4752 ZT12-15 0 0 0 ZT16-19 29.71985 29.71985 29.71985 ZT20-23 28.637749999999997 28.637749999999997 28.637749999999997