A scientist is studying a species of polar bear, found in and around the Arctic Ocean. Their range is limited by the availability of sea ice, which they use as a platform to hunt seals, the mainstay of their diet. The destruction of its habitat on the Arctic ice, which has been attributed to global warming, threatens the bear’s survival as a species; it may become extinct within the century.1 A random sample of n550 polar bears produced an average weight of 445 kilograms with a standard deviation of 48 kilograms. Use this information to estimate the average weight of all Arctic polar bears.