condition mean min max ZT0-3 49.970529 49.970529 49.970529 ZT4-7 107.312512 107.312512 107.312512 ZT8-11 121.92849000000001 121.92849000000001 121.92849000000001 ZT12-15 96.279117 96.279117 96.279117 ZT16-19 69.808754 69.808754 69.808754 ZT20-23 64.40766149999999 64.40766149999999 64.40766149999999