An Economist Conducted a Study of the Possible Association Between

Multiple Choice

An economist conducted a study of the possible association between weekly income and weekly grocery expenditures. The particular interest was whether higher income would cause shoppers to spend more on groceries. A random sample of shoppers at a local supermarket was obtained. A questionnaire was administered asking about the weekly income of each shopper's family and their grocery bill for that week. The gender of each shopper was also obtained. The data below are expenditures and income for 10 selected survey participants. The correlation for these data is given by:

A) 0.649.
B) -0.649.
C) 0.4212.
D) -0.4212.