申論題

6. (15%) Suppose that Mr. A estimates a simple linear regression model and obtains the results 
Y = 15 + 0.81 X n=19
(t=3.1) (t=18.7) R²=0.99
where the numbers in parentheses are t ratios, and n is the number of observations.

(a) (5%) Use the t ratio to test the hypothesis that X is a statistically significant variable.