The variables saved in Dataset 1 part 3A are: abs (Y, average number of days absent per employee) salary (X1, average employee salary in $) ava (X2, availability of shift work, coded 1 if yes and 0 if no)

SUMMARY OUTPUT Regression Statistics Multiple R 0.840918168 R Square 0.707143364 Adjusted R Square 0.68571483 Standard Error 1.90369734 Observations 45 ANOVA df SS MS F Significance F Regression 3 358.7831717 119.5943906 33.00008085 5.14586E-11 Residual 41 148.5866061 3.624063563 Total 44 507.3697778 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0% Intercept 5.850203113 1.132080826 5.167654974 6.53035E-06 3.563919503 8.13648672 3.563919503 8.136486724 salary -5.37574E-05 4.52982E-05 -1.186742978 0.242160074 -0.00014524 3.7724E-05 -0.000145239 3.77243E-05 swork -4.155589794 1.017969843 -4.082232714 0.000201258 -6.2114216 -2.09975799 -6.211421598 -2.09975799 Interaction 0.935539777 0.121602434 7.6934297 1.76081E-09 0.68995868 1.18112087 0.68995868 1.181120875