# Question

Students use many kinds of criteria when selecting courses. “Teacher who is a very easy grader” is often one criterion. Three teachers are scheduled to teach statistics next semester. A sample of previous grade distributions for these three teachers is shown here.

At the 0.01 level of significance, is there sufficient evidence to conclude “The distribution of grades is not the same for all three professors?”

a. Solve using the p-value approach.

b. Solve using the classical approach.

c. Which professor is the easiest grader? Explain, citing specific supporting evidence.

At the 0.01 level of significance, is there sufficient evidence to conclude “The distribution of grades is not the same for all three professors?”

a. Solve using the p-value approach.

b. Solve using the classical approach.

c. Which professor is the easiest grader? Explain, citing specific supporting evidence.

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