Suppose 50 Married Couples Are Asked to Provide Their Ages

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.