Chinchillidae Range. The family of mammals called Chinchillidae contains the chinchilla and viscachas, which are large South American rodents. The article, “Species Richness and Distribution of Neotropical Rodents, with Conservation Implications” (Mammalia, Vol. 77, Issue 1, pp. 1–19) by G. Amori et al., reports the range sizes of each species of Chinchilladae. There are six species in the Chinchillidae family and the size of each species’ range, in square kilometers (km2), is given in the following table.

370,954.56 762,822.31 11,213.32 2,070.38 11,943.02 1,988,086.68

a. Obtain and interpret the population mean range of Chinchilladae species.

b. Obtain and interpret the population standard deviation of the ranges of Chinchilladae species.