Question 1:
Interpret the null hypothesis using your t-statistic.
Interpret the null hypothesis using p-value.
Interpret your confidence interval and test the null hypothesis using confidence interval.
Question 2:
Is it simple regression model or multiple regression model?
Write down the regression equation.
Write down the null hypothesis and alternative hypothesis for regression coefficients.
Interpret hypothesis testing results for each coefficient respectively
Explain coefficient for age and dis.
What does R_squared tell you?