An Economist Conducted a Study of the Possible Association Between

question 18

Multiple Choice

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.

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Definitions:

Endoplasmic Reticulum

A membranous network within cells that is involved in protein and lipid synthesis, transport, and detoxification processes, existing in two forms: rough and smooth.

Calcium Ions

Positively charged calcium atoms (Ca2+) that play essential roles in biological processes like bone formation, muscle contraction, and blood clotting.

Signaling Pathway

Complex networks of molecules that transmit information from external stimuli to a cell's interior, triggering specific cellular responses.

Phosphodiesterase

An enzyme that plays a critical role in cellular signaling by breaking down phosphodiester bonds within cyclic nucleotides like cAMP and cGMP.