Suppose you're interested in studying state-level differences in mortality in the United States. A random sample of the mortality records of 1,000 California residents yields a mean age of death of 79.0 years with a standard deviation of two years. A random sample of the mortality records of 1,000 Texas residents, however, yields a mean age of death of 77.0 years with a standard deviation of four years. Test the hypothesis that there is a DIFFERENCE (the fact that the word "difference" is capitalized, bolded, and highlighted should give you a clue as to how to set this problem up) in the mean ages of death of California and Texas residents. How many degrees of freedom are present in this distribution? Group of answer choices 1,998 198 199 10