Refer to the Amphibian & Reptile Conservation (Aug. 2013) study of Environmental Vulnerability Scores (EVS) for amphibian

Question:

Refer to the Amphibian & Reptile Conservation (Aug. 2013) study of Environmental Vulnerability Scores (EVS) for amphibian species native to Mexico, Exercise 4.30 (p. 194). The EVS values for 382 snake species are summarized in the table below. Let x represent the EVS score for a randomly selected snake species in Mexico. Find the mean of x, and interpret the result.