18.        The Donner Party. In 1846 the Donner party became stranded while crossing the Sierra Nevada mountains near Lake Tahoe. (Data from D. J. Grayson, “Donner Party Deaths: A Demo- graphic Assessment,” Journal of Anthropological Research 46 (1990): 223–42. See also Section 20.1.1.) Shown in the following tables are counts for male and female survivors for six age groups. Is there evidence that the odds of survival are greater for females than for males, after the possible effects of age have been accounted for?

 

Age category

 

15–19                20–29                30–39                40–49                50–59                60–69

 

                                                                                                                                                                                                                          

Lived  Died      Lived  Died      Lived  Died     Lived  Died      Lived  Died      Lived  Died

Male Female