A professor gives a multiple choice exam where each question has four choices. The professor decides not to count a question against students if the class as a whole does worse on the question than they would have done simply by guessing. That is, if significantly less than 25% of the students answer a question correctly, then that question won't count against them. Let p represent the proportion of students that would correctly answer the question.
Which of the following is an appropriate set of hypotheses for such a significance test?

ANSWER: H0​:p=0.25
Ha​:p<0.25​