condition mean min max ZT0-3 9.538025 9.538025 9.538025 ZT4-7 9.9862345 9.9862345 9.9862345 ZT8-11 9.996307 9.996307 9.996307 ZT12-15 9.106915 9.106915 9.106915 ZT16-19 10.197303000000002 10.197303000000002 10.197303000000002 ZT20-23 9.664111 9.664111 9.664111