Can someone compare these distributions and help me figure out the null and alternative hypotheses to test whether the survival is related to the weight (while stating the parameter of interest and defining the symbols)? Here's some additional info

In a famous 1898 lecture, a biologist named Bumpus presented data that he analyzed to study the process of natural selection. The data were obtained from adult male house sparrows, some of which had survived a particularly severe winter storm, and others of which had perished. Bumpus investigated whether those that survived had physical characteristics that may have helped them to withstand the storm. Bumpus also recorded the weights (in grams) of each sparrow. One hypothesis is that heavier birds are bigger and stronger, therefore more likely to survive the storm. Another hypothesis is that heavier birds are less agile and less mobile, therefore less likely to survive the storm. A third possibility is that there is no association between a bird's weight and its capacity to survive the storm.