5. Suppose that the fusing time of fuse wire X ~N(u,o'), X, X2, ,X1, represent a random sample from X and are recorded as follows: 65 , 42, 78, 75, 71, 69 , 68 , 57 , 55, 54 Test the null hypothesis u -65 against the alternative hypothesis u + 65 at the 0.05 level of significance. (20 points)<