Color-blind Medical literature says that about 8% of males are color-blind. A university’s introductory psychology course is taught in a large lecture hall. Among the students, there are 325 males. Each semester when the professor discusses visual perception, he shows the class a test for color blindness. The percentage of males who are color-blind varies from semester to semester.

1. Is the sampling distribution model for the sample proportion likely to be Normal? Explain.

2. What are the mean and standard deviation of this sampling distribution model?

3. Sketch the sampling model, using the 68–95–99.7 Rule.

4. Write a few sentences explaining what the model says about this professor’s class.