The following table presents measurements of the tensile strength (in kilopascals) of asphalt-rubber concrete beams for three levels of binder content and three levels of rubber content. 
Can the mean effect of the binder content be interpreted? If so, interpret the main effect. Use the 
= 0.01 Level of significance.
Definitions:
Commercial Paper
Unsecured, short-term promissory notes of large firms, usually issued in denominations of $100,000 or more and having an interest rate of somewhat below the prime rate.
Credit Quality
An assessment of the creditworthiness of a borrower, reflecting their ability to repay debt.
Risky
Involving or exposed to a high degree of uncertainty or subject to potential loss.
Prime Rate
The lowest interest rate that banks generally charge their best customers.
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