Suppose you've just been hired as a statistics professor, butyou've never taught undergrads before. While you're doing your best, you're not sure you're fully up to par with all the other excellent statistics professors out there. You decide to look at your 41 students' grades on their midterm exam. They averaged grades of 81 on this exam, with a standard deviation of 10. You reason that if they're higher than normal, you might be making things too easy for them. Likewise, if they're lower than normal, you might be making things too hard. Seeking a Goldilockseffect, you compare this with the national average of statistics midterm exam scores - this is 79.

Two-part question: What is A) Your alternative hypothesis and B) Your null hypothesis?