A researcher wanted to know if the order in which runners finish a race is correlated with their weight. She conducts an experiment and the data are given below. 
What is the appropriate correlation coefficient for these data?
Definitions:
Materials Price Variance
The difference between the actual cost of materials purchased and the standard cost, multiplied by the quantity of materials purchased.
Raw Materials Price Variance
The difference between the actual cost of raw materials and the expected (or standard) cost.
Raw Materials Quantity Variance
It measures the difference between the expected amount of raw materials needed for production and the actual amount used.
Standard Cost
A predetermined cost of manufacturing a single unit or a specified quantity of a particular product or service, used as a benchmark to measure performance.
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