condition mean min max ZT0-3 423.988 423.988 423.988 ZT4-7 279.514 279.514 279.514 ZT8-11 347.92 347.92 347.92 ZT12-15 269.9895 269.9895 269.9895 ZT16-19 338.19550000000004 338.19550000000004 338.19550000000004 ZT20-23 312.16200000000003 312.16200000000003 312.16200000000003