condition mean min max ZT0-3 7171.3 7171.3 7171.3 ZT4-7 6710.9 6710.9 6710.9 ZT8-11 6191.85 6191.85 6191.85 ZT12-15 5322.05 5322.05 5322.05 ZT16-19 6232.6 6232.6 6232.6 ZT20-23 7061.9 7061.9 7061.9