18. Brown tree snakes are an invasive species causing huge environmental and financial damage in Guam. Researchers captured 504 brown tree snakes on Guam's Andersen Air Force Base. The distribution of brown tree snake weights was clearly right- skewed. On average, the snakes weighed 121 g (standard error of the mean, SEM = 3 g) and ranged from 23 to 663 g at capture. What is a 95% confidence interval for the mean weight of brown tree snakes in Guam, approximately (Show work)? a. 23.0 to 663.0 g b. 115.1 to 126.9 g c. 118.0 to 124.0 g d. 120.7 to 121.3 g