Exercise 1:

In an effort to improve their program for teaching medical students how to speak effectively with patients, the following experiment was conducted. 20 year-three med students were randomly selected and randomly assigned into four groups of 5 students each. Group 1 attended traditional lectures, Group 2 was given a textbook of common situations and effective phrases, Group 3 was given a tape of professional physicians talking to their patients and Group 4 watched a real-life recording showing dr.-patient conversations. At the end of the semester, all 20 students were given the same oral exam on their ability to speak effectively with patients. The following scores were recorded:

1. Use these data to perform One Way ANOVA at α = 0.05. Determine whether, in general, these 4 teaching methods have different mean effects on the ability to communicate with patients.
2. Why would you choose One Way ANOVA instead of a two- sample t-test?
3. Is it appropriate to perform a Tukey test to determine specific differences between means? If so, conduct the Tukey test and describe the results.

Exercise 2:

A researcher wants to evaluate the effectiveness of a new drug rehabilitation program. 10 participants are evaluated at the beginning, at the end and 3 months after completing the program. Ratings are on an interval scale, and lower ratings indicate less drug dependence than higher ratings. The data are contained in ‘Activity 8_Exercise2.sav’ data file.

1. State the dependent and independent variable.
2. What type of ANOVA is appropriate here? Why?
3. State the null and alternative hypotheses.
4. Run the appropriate ANOVA
5. What are the assumptions and are they satisfied?
6. Is post-hoc analysis needed? Why or why not?
7. What is your conclusion?

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Solution: The downloadable solution consists of 5 pages, 627 words.
Deliverable: Word Document