condition mean min max ZT0-3 14.140966352500001 13.37214773 14.909784975 ZT4-7 16.30195432 11.299988485 21.303920155 ZT8-11 25.81451809 21.339974390000002 30.289061789999998 ZT12-15 18.6933118475 13.446656285 23.93996741 ZT16-19 7.289817746999999 6.4704401344999996 8.1091953595 ZT20-23 5.793552575 5.6824654 5.904639749999999