A report on health care in the US said that 28% of Americans have experienced times when they haven't been able to afford medical care. A news organization randomly sampled 801 black Americans, of whom 38% reported that there had been times in the last year when they had not been able to afford medical care. Does this indicate that this problem is more severe among black Americans? The following shows a few values for a test of an appropriate hypothesis. Which is not correct? A) Null hypothesis Ho : p = 0.28. The proportion of all black Americans that were unable to afford medical care in the last year is 28%. B) Alternative hypothesis. HA: p >0.28. The proportion of all black Americans that were unable to afford medical care in the last year is greater than 28%. C) Model: use the Student's t model because the black American population is likely the same as the rest of the American population. D) P(p > 0.38) = P(z > 6.29) =0 Conclusion: With a P-value so small (just about zero), I reject the null hypothesis. There is enough evidence to suggest that the proportion of black Americans who were not able to afford medical care in the past year is more than 28%