Suppose Bank of America would like to investigate if the credit score and income level of an individual are independent of one another.Bank of America selected a random sample of 400 adults and asked them to report their credit score range and their income range.The following contingency table presents these results. 
The test statistic for this sample is ________.
Definitions:
Debugging Techniques
Various strategies or methods employed to identify, track, and resolve bugs or errors in software code.
Sentinel Value
A special value used in programming to signal the end of a loop or to mark a boundary for iteration.
For Statement
A control flow statement in programming used for iterating over a range, array, or collection.
Multi-way If-else
A control flow statement that allows for multiple paths of execution based on the evaluation of several conditions.
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