Please help with hw questions, thank you

In an experiment to determine the effects of outside temperature on the emissions of diesel trucks, 10 trucks were run at temperatures of 40F and then again at 80F. The emissions of each truck at the two temperatures are presented in the table below 40F 894 832 711 780 773 807 728 769 844 855 80 F 878 825 674 749 727 772 697 693 889 834 40 F 80 F Can you conclude that the mean emissions are higher at 400F? Use the a = 0.07 level. a. State the null and alternative hypotheses. Ho: ? v ? Select an answer v H1 : ? v ? Select an answer v b. Find the critical value and sketch the rejection region. Sketch of Rejection Region: 0 2 -2 1 2 Q Q Q O Critical value(s): (If there are two critical values, list both values separated by a comma) c. Find the test statistic.cl. Find the p-value. e. Decide: Select an answer v H0 f. Conclusion: At 0: = 0.07 significance level, there Select an answer v enough evidence to conclude that the mean emissions are higher at 40F. City ofcials in Sacramento and Dallas conducted a stud);r to estimate the mean commute time of their residents. The commute times (in minutes] of samples of residents from each city is shown below. Click on the data buttons to open the data in a new window. Sacramento Data Dallas Data Can we conclude that the mean commute time in Sacramento differs from the mean commute time in Dallas? Use the o = 0.03 level. a. State the null and alternative hypotheses. H0: Select an answer V ? V Select an answer V H1 : Select an answer v ? v Select an answer v b. Find the critical value and sketch the rejection region. Sketch of Rejection Region: -3-2-IOI23-3-2-10123-3-2-10123 Critical value(s): (If there are two critical values. list both values separated by a comma) c. Find the test statistic. d. Find the p-value. e. Decide: Select an answer v H0 f. Conclusion: At a = 0.03 significance level, there Select an answer v enough evidence to conclude that the mean commute time in Sacramento differs from the mean commute time in Dallas