Suppose you have the following partial Excel output. The p-value in the associated ANOVA is 0.0007. Calculate the test statistic associated with testing whether there is a significant linear relationship between the fourth explanatory variable and the response variable. Round your result to 3 decimal places.

Coefficients Standard Error Intercept 8.59 5.809 X Variable 1 3.37 6.525 X Variable 2 7.83 4.166 X Variable 3 5.84 6.599 X Variable 4 1.32 9.009