Analyze the table. While there are several procedures that allow:

a) What is the most appropriate statistical measure to summarize the central tendency of the data in the table?

b) True or False: The table exhibits a positive correlation between the variables X and Y.

c) Which of the following statistical tests would be suitable for assessing the significance of the observed differences in the table?

1. Chi-square test
2. T-test
3. ANOVA
4. Regression analysis