Has the percentage of registered nurses earning more advanced academic degrees changed? In 1980 55% of registered nurses had a high school diploma as their highest-level education, 80% had an associate degree, 22 had a bachelor's degree, in 5 people had a mass degree. In 2012, a random sample of 800 registered nurses was obtained. Of those sampled, 111 had a high school diploma as their highest educational degree, 295 had an associate degree, 289 had a bachelor's degree, and 105 have a master's degree. At the 5% significance level, what conclusion can be reached?

A. Give the null and alternative hypothesis:

B. Verify the assumptions:

C. Give the CI for the proportion of nurses with an associate degree. Based on the confidence interval, clearly state your final conclusion with respect to that proportion.