condition mean min max ZT0-3 34.581811540000004 33.93624423 35.22737885 ZT4-7 32.5520180625 29.63410157 35.469934554999995 ZT8-11 57.080096590000004 44.418675765 69.741517415 ZT12-15 39.044768027500005 23.18174437 54.90779168500001 ZT16-19 21.148188235 20.415261559999998 21.88111491 ZT20-23 16.0463170925 15.736975975 16.35565821