How do you determine the degrees of freedom for Spearman’s rank order correlation?Question 1: 100 smokers are enrolled in a study to test the efficacy of a smoking-cessation drug. All participants are given the drug. The researchers contact the subjects at 3 months, 6 months, and 12 months; at each of those 3 intervals, the subjects are classified as either Smoking or Not Smoking.
What statistical test should the researchers use to determine if there is a difference in the proportion of Smoking vs. Not Smoking at those 3 intervals? Explain your choice.
Question 2: How do you determine the degrees of freedom for Spearman’s rank order correlation?
Question 3:
What is the benefit of performing the Cochran’s Q test rather than examining frequency tables and performing McNemar testing alone?
Question 4:
What is the difference in interpretation of Pearson’s correlation and the coefficient of determination?
Question 5:
If you perform a Pearson correlation on multiple different continuous variables, do you have to run a Bonferroni correction on the corresponding p-values? Explain your reasoning.
Question 6:
Definition of Dichotomous data and 2 examples
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