condition mean min max ZT0-3 11.107099999999999 11.107099999999999 11.107099999999999 ZT4-7 9.92535 9.92535 9.92535 ZT8-11 8.41201 8.41201 8.41201 ZT12-15 10.438220000000001 10.438220000000001 10.438220000000001 ZT16-19 13.057400000000001 13.057400000000001 13.057400000000001 ZT20-23 14.0366 14.0366 14.0366