Suppose 50 Married Couples Are Asked to Provide Their Ages

question 33

Multiple Choice

Suppose 50 married couples are asked to provide their ages. For all couples, the husband is exactly 2 years older than his wife. For example, a 50- year-old husband has a wife who is 48 years old. What is the best estimate of the correlation coefficient between the ages of husbands and their wives?

• A)No conclusions can be drawn without seeing a scatterplot of the data.
• B)The correlation coefficient between the ages of husbands and wives is equal to 1.
• C)The correlation coefficient between the ages of husbands and wives is equal to 0.
• D)The correlation coefficient between the ages of husbands and wives is equal to −1.

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Definitions:

Demand Curve

A graph showing the relationship between the price of a good and the quantity demanded, typically downward-sloping due to the law of demand.

Surplus

The excess of supply over demand in a market, typically resulting in downward pressure on prices.

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The average hourly or annual pay that nurses receive, which can vary based on factors like geographic location, experience, and specialty.

Quantity Demanded

The total amount of a good or service that consumers are willing and able to purchase at a given price.