A simple regression analysis with 12 Oberservations yielded the following estimates:
Yi=2.3 + 0.86Xi
Se= 7.17 0.05
t= 0.32 17.2
a) State the null and alternative hypotheses for b1 and b2
b) Apply the test of significance approach at 5% level for b1 and b2
c) Test the null hypotheses for b1 and b2 through the confidence interval approach at the 95%