Researchers are interested in how mean medical expenditures is associated with i

Question

Researchers are interested in how mean medical expenditures is associated with income. They use a multiple linear regression model to predict medical expenditures using income and age. They include an interaction between income and age in the model. The interaction term is statistically significant, but the main effect (coefficient) of age is not statistically significant. Therefore O The association between age and medical expenditures does not vary by income o The association between age and medical expenditures when income is 0 is not statistically significant. o The association between age and medical expenditures varies by income, but the the association between income and medical expenditures does not vary by age o The association between age and medical expenditures is not statistically signifcant, controlling for income.

Explanation / Answer

Option C is Correct

The associaton between age and Medical expenditures varies by Income. but the associaton between Income and Medical expenditures does not vary by large

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