Graduate students' responsibilities are often related to their roles as teaching assistants or research assistants. As part

Question:

Graduate students' responsibilities are often related to their roles as teaching assistants or research assistants. As part of a larger study, K.M. McGoldrick and her colleagues investigated the level of preparation of economics graduate students for their teaching- related duties for students at "top-tier" and those at "second-tier" schools.16 The responses to the question "Are you satisfied with the level of preparation you have had for year teaching related duties?" follow.

a. Is there a significant difference in the responses to the question between students at "top-tier" schools compared to those at "second-tier" schools?
b. If significant, describe the nature of the differences in response for graduate students at "top-tier" versus "second-tier" schools.