An automotive parts manufacturer recently acquired a 3-D printer that can produce two custom parts at once, with one part being printed on the left side of the printer and the other part being printed on its right side. A quality control manager wanted to make sure that the parts were being produced with a consistent weight, so she randomly selected 30 part designs and had the printer produce those parts. Then she weighed each pair of designs and recorded the results. The manager tests the paired data, where =0.10, in order to evaluate the claim that the true mean difference between the weight of parts manufactured by the left side of the printer and the weight of parts manufactured by the right side of the printer is not equal to zero. (a) H0:d=0, Ha:d0, which is a two-tailed test. The weight of the parts (in ounces) is provided in the above data set. (b) Use Excel to test the paired data and evaluate the claim that the true mean difference is not equal to zero. For each part design, calculate the sample difference by subtracting the right side weight from the left side weight. Identify the test statistic, t