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

Question

Quizplus · Accepted Answer

The null hypothesis states that all four printer mean times are equal, while the alternative hypothesis states that at least one of the printer mean times is different from the rest. This matches the consumer interest group's goal of comparing the speed of four different desktop printers. The other choices are not appropriate as they do not address the question of interest, or they are too specific or too general in their hypotheses.

A Consumer Interest Group Is Interested in Comparing the Speed