A Consumer Interest Group Is Interested in Comparing the Speed

Multiple Choice

A consumer interest group is interested in comparing the speed of four different desktop printers; four different documents are used for the experiment.Each test consists of randomly assigning one printer to one of the documents.The document is printed and the time to print in seconds is recorded.Each printer/document combination is tested.

A) H0: μ1 = μ2 = μ3 = μ4 vs.the alternative that not all the document mean times are equal
B) H0: μ1 = μ2 = μ3 = μ4 vs.the alternative that not all the printer mean times are equal
C) H0: μ1 ≠ μ2 ≠ μ3 ≠ μ4 vs.the alternative that all the printer mean times are equal
D) H0: μ1 ≠ μ2 ≠ μ3 ≠ μ4 vs.the alternative that all the document mean times are equal
E) H0: μprint ≠ μdoc vs.the alternative that printer and document mean times are equal