In the lecture-based semester, 28 students score an average of 78 on the final exam, with

a standard deviation of 7. In the discussion-based semester, 30 students score an

average of 75 on the final exam, with a standard deviation of 9. Based on this

information, are these methods different for student learning or should she consider

them equivalent?

1A. State your null and alternative hypotheses (be sure to say which is which).

1B. Using a 95% confidence level, state your t critical value for testing these hypotheses.

(Use any option for degrees of freedom discussed in class, such as in your practice

video.)

1C. Find your t value.

1D. What do you conclude? State this (a) in terms of the hypotheses; (b) in terms of the

teaching methods.

2. What was the point of the study about the dead salmon's brain activity? Explain as

fully as you can.