Now, answer these parts of question 1:

Do agreeable individuals get paid less, on average, than those who are less agreeable on the job? And is this gap greater for males than for females? These questions were addressed in the Journal of Personality and Social Psychology (Feb. 2012). The researchers modeled mean income in dollars as a function of both agreeableness score (where higher scores indicate a greater level of agreeableness) and a binary variable for gender (male = 1 if male, 0 if female). They consider an interaction model: O E(income) = Be + B agreeableness + B2male + Bzagreeableness x male > wagap$agreeablemale m3 summary(m3) Call: Im(formula = income agreeableness + male + agreeablemale, data = wagap) Residuals: Min 1Q Median -22782 -4759 -1092 3Q Max 4087 23105 Coefficients: (Intercept) agreeableness male agreeablemale Estimate Std. Error t value Pr(>ltl) 40977 8789 4.662 1.012-05 *** -5479 2644 -2.072 0.0409 54225 12989 4.175 6.56e-05 *** -8708 3935 -2.213 0.0293 * Signif. codes: 0 "***' 0.001 "**' 0.01 "*" 0.05 '.' 0.1''1 Residual standard error: 7776 on 96 degrees of freedom Multiple R-squared: 0.7626, Adjusted R-squared: 0.7552 F-statistic: 102.8 on 3 and 96 DF, p-value: wagap$agreeablemale m3 summary(m3) Call: Im(formula = income agreeableness + male + agreeablemale, data = wagap) Residuals: Min 1Q Median -22782 -4759 -1092 3Q Max 4087 23105 Coefficients: (Intercept) agreeableness male agreeablemale Estimate Std. Error t value Pr(>ltl) 40977 8789 4.662 1.012-05 *** -5479 2644 -2.072 0.0409 54225 12989 4.175 6.56e-05 *** -8708 3935 -2.213 0.0293 * Signif. codes: 0 "***' 0.001 "**' 0.01 "*" 0.05 '.' 0.1''1 Residual standard error: 7776 on 96 degrees of freedom Multiple R-squared: 0.7626, Adjusted R-squared: 0.7552 F-statistic: 102.8 on 3 and 96 DF, p-value: