An Economist Conducted a Study of the Possible Association Between

question 21

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. A second survey was conducted at a different supermarket, and the scatterplot was obtained for the relationship between grocery expenditures and incomes in that survey as well. The two scatterplots are given below: Which of the following statements is true?

• A)The correlations for both surveys are similar in magnitude.
• B)The correlation is closer to 1 in survey 1 than in survey 2.
• C)The correlation is closer to 0 in survey 1 than in survey 2.
• D)The correlations need to be calculated to determine which is closer to 1; a scatterplot cannot provide this information.

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Definitions:

Lasting Changes

Refers to permanent or enduring alterations in an individual, system, or environment over time.

Social Psychology

The scientific study of how individuals think, influence, and relate to one another within a social context.

Developmental Psychology

A branch of psychology that studies how people grow and change over the course of their life, from infancy to old age.

Personality Psychology

Refers to the branch of psychology that studies individual differences, traits, and patterns of thought and emotions that characterize a person over time.