The output voltage of a power supply is assumed to be normally is distributed. Sixteen observations taken at random on voltage are as follows: 10.35, 9.30, 10.00, 9.96, 11.65, 12.00, 11.25, 9.58, 11.54, 9.95, 10.28, 8.37, 10.44, 9.25, 9.38, and 10.85. Test the hypothesis that the mean voltage equals 12 V against a two-sided alternative using = 0.05 (6 points) Construct a 95% two-sided confidence interval on (4 points) Test the hypothesis that ^2=1 using = 0.05 (6 points) Construct a 95% two-sided confidence interval on (4 points)