PART (G) At the 5% level of significance, test whether the slope of Y with X1 differs by region. Slope of Bol sale price ) with B, [ volume) when region = 0: B, Slope of Bol sale price ) with B, [ volume) when region= 1 : B, + B, Hypothesis Test H.: B3=0 H : B370 Test Statistic by - 3 where so, SSX Syx t =- t= - -0.1914-0 0.8344 -where s, =0.8344 t=-0.2293863854 ~ -0.2294 Critical Value Using 5% level of significance (two tail test), the critical value of t with 24 (n-k-1 = 28 - 3 -1) degrees of freedom is 2.0639 Decision Rule Reject H, ift | test statistic| > [t critical value| As t test statistic | 0.2294 |