Consider the following regression equation for the US (Standard errors in parentheses):

P_t=4.00-.01PRP_t + .03PRB_t + .20YD_t

(.005) (.02) (.04)

Rbar²=.98 n=29

where p_t= per capita pounds of pork consumed in time period t

PRP_t =the price of pork in time period t

PRB_t =the price of beef in time period t

YD_t =per capita disposable income in time period t

a. Hypothesize signs and specify the appropriate null and alt. hypotheses for the coefficients of each of these variables (one sided test)

b. Test your hypotheses using the t-test at a 5% level of significance