For the distribution in the following graph, what is the value of ΣX? 
Definitions:
Correlation Coefficient
A statistical measure that indicates the extent to which two or more variables fluctuate together.
Correlational Approach
A nonexperimental method in which the researcher merely observes whether variables are associated or related.
Field Experiment
A study conducted in a real-world setting where the researcher manipulates one or more variables to observe their effect on a specific outcome.
Meta-analysis
A statistical technique that combines the results of multiple scientific studies to obtain a more precise effect size of the results.
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