A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states. At a=0.05, is there enough evidence to conclude that there is a difference in the interest rates paid by the two states?

State A State B

Sample size 80 50

Mean interest rate 4.0 4.5

Population variance 0.04 0.03

A) Yes, because the test value -15.08 is outside the critical region -1.96

B) Yes, because the test value -4.55 is outside the critical region -1.96

C) Yes, because the test value 227.27 is outside the critical region -1.96

D) No, because the test value -0.01 is inside the critical region -1.96