Suppose we know for a fact that the mean age at first marriage for American women is 28.4. A sample of 100 women from the great state of Utah, however, yields a mean age at first marriage of 24.4 with a standard deviation of 2. Test the hypothesis that the mean age at first marriage for Utah women is LOWER (the fact that the word "lower" is capitalized, bolded, and underlined should tell you something about how to set up this problem) than that of American women in general. What is your obtained statistic? Group of answer choices 5 10 1.96 -20