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The plant manager of a company that manufactures office equipment is attempting to determine the pro

Question: The plant manager of a company that manufactures office equipment is attempting to determine the process that will be used to assemble a new ergonomic chair. There are two methods under consideration that differ by the order in which the separate operations are performed. The following table shows the assembly times in minutes that were recorded by randomly selecting 25 workers for each method.

Method A	Method B
6.6	6.3
5.7	7.0
5.6	8.2
6.4	6.1
4.8	6.7
6.3	5.9
6.0	6.1
7.3	7.3
5.9	6.6
6.4	4.5
9.0	4.9
7.0	7.9
5.2	3.3
6.3	5.7
8.1	7.9
8.6	4.5
5.0	5.5
7.1	5.7
8.1	5.0
6.1	5.6
6.3	6.4
4.5	6.7
6.1	6.7
7.3	7.3
6.1	6.5