condition mean min max ZT0-3 6.3874669065 4.832860118 7.942073695 ZT4-7 10.2425654695 9.996653258333334 10.488477680666668 ZT8-11 10.403095649 10.243639336 10.562551962 ZT12-15 11.789713193833332 9.114822611666666 14.464603775999999 ZT16-19 8.961702797833334 8.909962393 9.013443202666668 ZT20-23 7.700311810166666 7.1085634933333335 8.292060127