condition mean min max ZT0-3 726.8499999999999 726.8499999999999 726.8499999999999 ZT4-7 535.6 535.6 535.6 ZT8-11 493.4 493.4 493.4 ZT12-15 569.65 569.65 569.65 ZT16-19 633.9000000000001 633.9000000000001 633.9000000000001 ZT20-23 697.8 697.8 697.8