condition mean min max ZT0-3 39.672018054999995 36.23883426 43.10520185 ZT4-7 41.8269363925 36.852394015 46.80147877 ZT8-11 44.5809998 42.37471423 46.78728537 ZT12-15 46.2391357225 45.126890965 47.35138048 ZT16-19 51.19056483 47.843848545 54.537281115 ZT20-23 72.200399625 64.698936305 79.701862945