Question: 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.

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