Tukey or Games-Howell Confidence Intervals for the Mean Difference Between Pair of Factor A's Categories - Statistics Assignment Help

Assignment Task:

Requirements: 
(1) Conduct a one-way ANOVA to test the null hypothesis that the dependent variable means are the same for all categories in Factor A amongst the population of list companies in all countries. Please perform hypothesis tests for homogeneity of variances, main effect and posthoc analysis. 

(2) Find Tukey or Games-Howell confidence intervals for the mean difference between pair of Factor A's categories. Is there any statistically significant mean difference between the pair of categories? (Report on these only where the differences are statistically significant.) 

Each hypothesis test must adhere to the hypothesis testing requirements in point (m), clearly analysed and presented. 

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