condition mean min max ZT0-3 1388.05 1388.05 1388.05 ZT4-7 1658.5 1658.5 1658.5 ZT8-11 1518.5 1518.5 1518.5 ZT12-15 1653.65 1653.65 1653.65 ZT16-19 1554.6999999999998 1554.6999999999998 1554.6999999999998 ZT20-23 1516.6 1516.6 1516.6