After studying four species of newly discovered primates that have the same body size,the scientists obtained the following data: Rank order the species by their expected social group size,from greatest to smallest,according to Dunbar.(no calculator needed)

Question

After studying four species of newly discovered primates that have the same body size,the scientists obtained the following data:  Rank order the species by their expected social group size,from greatest to smallest,according to Dunbar.(no calculator needed)

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Dunbar's number is a theoretical cognitive limit to the number of people or primates with whom one can maintain stable social relationships. It is calculated based on the ratio of neocortex size to total brain size. Dunbar's formula predicts that the social group size of a primate species is roughly proportional to the cube of the average neocortex size. Since all four species have the same body size, we can assume they have the same total brain size. Therefore, the species with the largest neocortex size will have the largest expected social group size. According to Dunbar's formula, the rank order of the species based on neocortex size should be D > B > A > C. Therefore, the expected social group size of the four species should be ranked in the same order, which is A)D > B > A > C.

After Studying Four Species of Newly Discovered Primates That Have