An economist conducted a study of the possible association between weekly income and weekly grocery expenditures. Of particular interest was whether higher income would result in shoppers spending 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. One question of interest was whether spending patterns differed much by gender. The scatterplot above shows red dots for females and black dots for males. Based on this plot:
A)males and females exhibit similar weak positive relationships between income and grocery expenditures.
B)males tend to spend more as income rises, while females spend the same whether income is high or low.
C)males spend more as income rises, while females spend less as income rises.
D)None of the answer options is correct.

Question

An economist conducted a study of the possible association between weekly income and weekly grocery expenditures. Of particular interest was whether higher income would result in shoppers spending 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. One question of interest was whether spending patterns differed much by gender.  The scatterplot above shows red dots for females and black dots for males. Based on this plot:
A)males and females exhibit similar weak positive relationships between income and grocery expenditures. 
B)males tend to spend more as income rises, while females spend the same whether income is high or low. 
C)males spend more as income rises, while females spend less as income rises. 
D)None of the answer options is correct.

Quizplus · Accepted Answer

The Answer of An economist conducted a study of the possible association between weekly income and weekly grocery expenditures. Of particular interest was whether higher income would result in shoppers spending 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. One question of interest was whether spending patterns differed much by gender.  The scatterplot above shows red dots for females and black dots for males. Based on this plot:
A)males and females exhibit similar weak positive relationships between income and grocery expenditures. 
B)males tend to spend more as income rises, while females spend the same whether income is high or low. 
C)males spend more as income rises, while females spend less as income rises. 
D)None of the answer options is correct.

An Economist Conducted a Study of the Possible Association Between