1. For a certain year a study reports that the percentage of Americans aged 21 30 that had personal credit card debt was 72%. A researcher claims that this is too high for Americans aged 21 30 that have at least a Bachelor's degree. In a random sample of 320 Americans aged 2 1 30 with at least a Bachelor's degree, 208 of them had personal credit card debt. At a: = 0.01, is the researcher correct about her claim? a. State the null and alternative hypotheses AND identify which is the researcher's claim. b. Determine the critical value[s] that separate the rejection region[s] from the non-rejection region. c. Compute the appropriate test statistic and provide the corresponding p-value. d. Make your decision about the evidence and provide a justication