In an experiment to determine the effect of ambient temperature on the emissions of oxides of nitrogen (NO,) of diesel trucks, 10 trucks were run at temperatures of 40'F and 80"F. The emissions, in parts per billion, are presented in the following table. Truck 40 F 80"F 1 834.7 815.2 2 753.2 765.2 855.7 842.6 A 901.2 797.1 785.4 764.3 O 862.9 819.5 882.7 783.6 8 748.0 772.9 Can you conclude that the mean emissions are higher at 40 F? Use a=0.05. (1) Critical Value (Round off to 3 decimal places): (2) Test Statistic (Round off to 2 decimal places): (3) Conclusion: (Type 'Reject HO' or 'Fail to Reject HO")