Yearly returns (rounded to the nearest percent)for GLD a gold exchange traded fund and SLV a silver exchange traded fund are reported in the following table. 
a.Calculate the covariance between GLD and SLV.
B)Calculate and interpret the correlation coefficient.
Definitions:
Standard Direct Labor Cost
The predetermined cost of labor assigned directly to the production of goods, based on estimated time and wage rates.
Total Overhead Variance
The difference between the actual overhead incurred and the overhead allocated to production over a period.
Sales Price Variance
The difference between the actual selling price and the expected selling price of a product multiplied by the number of units sold.
Average Price
The mean cost of a commodity or service computed by dividing the total cost of all units purchased by the number of units.
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