3. Discovery-Based Teaching Two biology instructors set out to evaluate the effects of discovery-

based teaching compared to the standard lecture-based teaching approach in the laboratory.The discovery-based approach asked questions rather than providing directions, and used small group reports to decide the best way to proceed in reaching the laboratory objective. At the end of the course, students provided evaluations as is given in the following table.

a. Is there a significant difference in the proportion of positive responses for each of the teaching methods?
Use a 5.05. If so, how would you describe this difference?

b. What is the approximate p-value for the test in part a?

Positive Group Evaluations Negative Evaluations Total Discovery Control 37 11 48 31 17 48