condition mean min max ZT0-3 10.19866 10.19866 10.19866 ZT4-7 10.450160499999999 10.450160499999999 10.450160499999999 ZT8-11 10.381363499999999 10.381363499999999 10.381363499999999 ZT12-15 9.817781 9.817781 9.817781 ZT16-19 10.352355 10.352355 10.352355 ZT20-23 9.4502485 9.4502485 9.4502485