The International Shark Attack File, maintained by the American Elasmobranch Society and the Florida Museum of Natural History, is a compilation of all known shark attacks around the globe from the mid 1500s to the present. Following is a contingency table providing a cross classification of worldwide reported shark attacks during the 1990s, by country and lethality of attack.

a. Find P(C₂).

b. Find P(C₂ & L₁).

c. Obtain P(L₁|C₂)directly from the table.

d. Obtain P (L₁|C₂) by using the conditional probability rule and your answers from parts (a) and (b).

e. State your results in parts (a)€“(c) in words.

Transcribed Image Text:

Lethality Nonfatal Fatal Total L1 L2 Australia 9. 56 65 C1 Brazil 12 21 33 C2 South Africa 8. 57 65 Сз United States 5 244 249 C4 Other 36 92 128 C5 Total 70 470 540 Country