In a study, researchers collected data on the participants' age, income, and the number of hours they exercise each week. How can we use multiple regression analysis to assess the combined effect of age and income on the time spent exercising, including e
Answer 1
Mary Hubbard
To assess the combined effect of age and income on exercise time using multiple regression analysis, we can model exercise hours as the dependent variable and age and income as independent variables. First, verify assumptions: linearity, homoscedasticity, normality of residuals, and independence. Check for multicollinearity using Variance Inflation Factor (VIF); VIF > 10 indicates significant multicollinearity. Address issues by removing or combining variables if necessary. Evaluate model fit using R-squared and adjusted R-squared.
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