Suppose that a researcher is interested in the effect of a new college preparation course on scores for a standardized critical thinking test with a population mean of = 20. Students receive training in the course and later receive the standardized test. The researcher wants to test the hypothesis that the course affected test scores.

	Answer	Possible points
In words, state the null and alternative hypotheses as they relate to the treatment in this example.	null=there is no effect of the college preparation course Alt=there is an effect of the college preparation course	0.50
Use symbols to state the null and alternative hypothesis.	null= H 0=u prepcourse<_20 Alt=H 1=u prepcourse >20	0.50
Define the alpha level and the critical region for a hypothesis test.		0.50
Define a Type I error and a Type II error and explain the consequences of each. Which type of error is worse? Why?		0.50