In a Simple Linear Regression, the Most Commonly Encountered Pair $\beta _ { 1 }$

Short Answer

In a simple linear regression, the most commonly encountered pair of hypotheses about $\beta _ { 1 }$ is $H _ { 0 } : \beta _ { 1 } = 0 \text { versus } H _ { \pm} : \beta _ { 1 } \pm 0 \text {. }$ A test of these two hypotheses is often referred to as the __________.