condition mean min max ZT0-3 22.0201 22.0201 22.0201 ZT4-7 13.723400000000002 13.723400000000002 13.723400000000002 ZT8-11 16.1328 16.1328 16.1328 ZT12-15 25.4361 25.4361 25.4361 ZT16-19 25.752299999999998 25.752299999999998 25.752299999999998 ZT20-23 31.623400000000004 31.623400000000004 31.623400000000004