condition mean min max ZT0-3 12.43557 12.43557 12.43557 ZT4-7 12.692697500000001 12.692697500000001 12.692697500000001 ZT8-11 13.340733499999999 13.340733499999999 13.340733499999999 ZT12-15 15.686317500000001 15.686317500000001 15.686317500000001 ZT16-19 12.43557 12.43557 12.43557 ZT20-23 9.7079235 9.7079235 9.7079235