condition mean min max ZT0-3 30.31155 23.561300000000003 40.473 ZT4-7 34.96015 34.96015 34.96015 ZT8-11 31.9546 31.9546 31.9546 ZT12-15 56.275850000000005 46.190650000000005 66.36105 ZT16-19 43.574650000000005 43.574650000000005 43.574650000000005 ZT20-23 50.77345 50.77345 50.77345