Question: A student believes that no more than 20% (i.e., ? 20%) of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sample received A’s.

a. Do a right-sided test for the population proportion at 5% significance.

b. Using a standardized test statistic, test the hypothesis at the 1% level of significance.

c. Using a p-value, test the hypothesis at the 1% level of significance.