5. In an effort to better understand potential causes of college student's self-confidence, a group of researchers selected a sample of 120 college students in Texas and measured self-confidence and depression levels using the appropriate the scales. They then ran a linear regression model and got the following results: (10 pts) Unit: point Range: 0 ~ 40 Coefficients: Estimate Std. Error t value Pr(> |t[) (Intercept) 3.91667 0.08972 43.655