condition mean min max ZT0-3 756.8499999999999 756.8499999999999 756.8499999999999 ZT4-7 620.7 620.7 620.7 ZT8-11 746.5 746.5 746.5 ZT12-15 882.3 882.3 882.3 ZT16-19 954.3 954.3 954.3 ZT20-23 858.25 858.25 858.25