An automobile parts store was interested in comparing the mean life length of three brands of automobile brake shoes. The following data represent the life length, measured in thousands of kilometres, of random samples of six sets of brake shoes of each brand: 
Use the following output from statistical software to determine which of the means differ at the 0.05 level of significance.
Tukey's pairwise comparisons
Family error rate = 0.0500
Individual error rate = 0.0203
Critical value = 3.67
Intervals for (column level mean) - (row level mean) 
Definitions:
Preindustrial
Refers to societies or stages of economic development characterized by agriculture, limited technology, and manual labor as the basis of the economy, before the advent of industrialization.
Post-Industrial
Referring to a stage of economic development in which the service sector generates more wealth than the manufacturing sector of the economy.
Housework
Routine tasks and chores done to maintain the household, such as cleaning, cooking, and laundry.
Husbands
Men who are married, typically referring to their role and responsibilities within the context of a marital relationship.
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