A student believes that no more than 20% (i.e., ? 20%) of students who finish statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of students in sample received As.
a. Describe the null and alternative hypotheses.
b. Using standardized test statistic, test the hypothesis at the 1% level of significance.
c. Using p-value, test the hypothesis at the 1% level of significance.