You work for an airline and the customer database has information on Relationship Status as well as amount paid for recent travel tickets. Relationship status is coded as: 0:Single, 1:Married, 2: Divorced, 3:Widowed, 4:Commited, 5:It's Complicated. Amount spent is in the database as actual dollars paid. Your Chief Marketing Officer wants to determine whether there is a correlation between amount spent and the customer's relationship status. She asks you to calculate the correlation between relationship-status and amount spent. Is this a good idea, or not? Explain.