Faced with a sample of the parts of an order, the quality control inspector has to decide whether to accept the order or to return it to the supplier because it does not meet the specifications. Suppose that a specification for a given part is that its average length should be 3 cm. If the average length is less than or greater than 3 cm, the parts will cause quality problems in the assembly operation. In this case the alternative hypothesis is: Select one: a. H1:3 b. H1:3 c. H1:=3 d. H1:3 e. H0:=3