1. Discuss the way in which the number of groups influences the choice of a statistical test of difference. Include at least one (1) example or scenario of such influence to support your response.
2. Discuss the fundamental differences between one-way Analysis of Variance (ANOVA) and factorial ANOVA, repeated measures ANOVA, Analysis of covariance (ANCOVA), and multivariate ANOVA. Find a healthcare research article that reports the results of a study that used ANOVA analysis. Provide a summary of the study, including the research questions/study aims.
3. Imagine that a friend of yours is pleased that the results of a Kruskal—Wallis test your friend ran as part of a dissertation turned out to be statistically significant at alpha = .05. Your friend followed up this significant result with 15 Mann—Whitney tests and found out that the results were also statistically significant at alpha = .05. Suggest one (1) overall strategy to your friend to interpret your friend’s finding from the tests. Provide a rationale for your suggestion
4. A researcher found that there is a significant association between gender and pain level (low versus high) and the associated Phi measure was .30. Discuss how you would interpret this measure. Explain your answer