Degree of freedom can you include they in part B and not part D please .

Espanol A coin-operated drink machine was designed to discharge a mean of / ounces of coffee per cup. In a test of the machine, the discharge amounts in 13 randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were b./9 ounces and U.2/ ounces, respectively. If we assume that the discharge amounts are normally distributed, is there enough evidence, at the U.US level of significance, to conclude that the true mean discharge, J, differs from / ounces? Perform a two-talled test. Then complete the parts below. Carry your Intermediate computations to three or more decimal places and round your answers as specified in the table. ( If necessary, consult a list of formulas.) (a) state the null hypothesis Ho and the alternative hypothesis H, O M X S P H, :I (b) Determine the type of test statistic to use. Degrees of freedom: D-0 030 020 (c) Find the value of the test statistic. (Round to three or more decimal places.) 0+0 030 0>0 (d) Find the two critical values. (Round to three or more decimal places.) X 5 ? D and (e) At the 0.05 level of significance, can we conclude that the true mean discharge differs from 7 ounces? O Yes ONo A