A study compares the strength of a product between two different materials used to make the product and five different labs that created these products.The profile plot of the group means is shown below. 
Based on this plot,does there seem to be a main effect for material?
Definitions:
Cash Flows
The total amount of money being transferred into and out of a business, project, or financial product.
MACRS
Modified Accelerated Cost Recovery System, a method of depreciation used for tax purposes in the United States to recover the cost of tangible property over its useful life.
Cost of Capital
The average rate of return a company must pay to its security holders to fund its assets, integrating the cost of debt and equity.
Incremental Cash Flows
The additional cash flow from taking on a new project, considered essential for analysis in capital budgeting.
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