condition mean min max ZT0-3 22.892819 22.892819 22.892819 ZT4-7 20.864714499999998 20.864714499999998 20.864714499999998 ZT8-11 35.397962500000006 35.397962500000006 35.397962500000006 ZT12-15 37.3617795 37.3617795 37.3617795 ZT16-19 56.972203 56.972203 56.972203 ZT20-23 45.676139 45.676139 45.676139