condition mean min max ZT0-3 932.75 932.75 932.75 ZT4-7 668.7 668.7 668.7 ZT8-11 684.8499999999999 684.8499999999999 684.8499999999999 ZT12-15 637.7 637.7 637.7 ZT16-19 790.5 790.5 790.5 ZT20-23 906.85 906.85 906.85