Below You Are Asked to Decide on Whether or Not

Essay

Below you are asked to decide on whether or not to use a one-sided alternative or
a two-sided alternative hypothesis for the slope coefficient.Briefly justify your
decision.
(a) $$\widehat { q _ { i } ^ { d } } = \widehat { \beta } _ { 0 } + \widehat { \beta } _ { 1 } p _ { i } \text {, where } q ^ { d } \text { is the quantity demanded for a good, and } p \text { is its price. }$$