A multiple regression analysis produced the following tables.

n change to 18

Predictor Coefficients Standard Error t Statistic p-value Intercept 616.6849 154.5534 3.990108 0.000947 X1 -3.33833 2.333548 -1.43058 0.170675 x 1.780075 0.335605 5.30407 5.83E-05 2 Source Regression Residual Total df SS M S F P -value 121783 60891.48 14.76117 0.000286 1561876.68 4125.112 17 183659.6 These results indicate that none of the predictor variables are significant at the 5% level X1 is significant at the 5% level x2 is significant at the 5% level O each predictor variable is significant at the 5% level O the intercept is not significant at 5% level