condition mean min max ZT0-3 1554.25 1554.25 1554.25 ZT4-7 1464.6 1464.6 1464.6 ZT8-11 1649.4 1649.4 1649.4 ZT12-15 1753.65 1753.65 1753.65 ZT16-19 1726.6999999999998 1726.6999999999998 1726.6999999999998 ZT20-23 1700.7 1700.7 1700.7