Professor Alpha and Beta both teach statistics. The following table shows the distribution of their final grades. We wonder whether one of these professors is an "easier'" grader
a) create a table of each professor's expected counts, and explain why a chi-squared procedure is appropriate
b) write an appropriate null hypothesis
c) test your hypothesis about the 2 professors, and state your conclusion
|
Prof. Alpha |
Prof. Beta
|
| A |
3 |
9 |
| B |
11 |
12 |
| C |
14 |
8 |
| Below C |
12 |
3 |