An instructor wants to show her class that an average of more than 8 out of 10 Students

Pass the physical exam at the end of the year. What alternative hypothesis and null hypothesis might the class work with? The instructor's hypothesis is that on average, of 80% of students will pass the physical exam at the end of the year. The null hypothesis of 60%. With an alpha of .05 is there enough evidence to support the instructor's claims?

The Z = 9.38 and the P-value = 0.0000.