condition mean min max ZT0-3 9139.5 9139.5 9139.5 ZT4-7 8079.99 8079.99 8079.99 ZT8-11 8467.74 8467.74 8467.74 ZT12-15 8993.630000000001 8993.630000000001 8993.630000000001 ZT16-19 9406.223333333333 9406.223333333333 9406.223333333333 ZT20-23 8819.369999999999 8819.369999999999 8819.369999999999