condition mean min max ZT0-3 0.12363620150000001 0.087943174 0.15932922900000002 ZT4-7 0.7915753827500001 0.5370542105 1.046096555 ZT8-11 2.4349670715 1.8877711364999998 2.9821630065 ZT12-15 2.9778837875 2.9594415979999997 2.9963259770000006 ZT16-19 2.78068226625 2.317261335 3.2441031975 ZT20-23 7.54975358925 5.2383913374999995 9.861115841