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 rubber content be interpreted? If so, interpret the main effect. Use the a= level of significance.
Definitions:
Empirical
Based on observation or experience rather than theory or pure logic.
Probable Truth
A statement or fact that is likely to be accurate or true based on evidence or reasoning.
Test of Truthfulness
A method or procedure used to determine the accuracy or honesty of a statement or proposition.
Statistical Analyses
The collection, examination, interpretation, presentation, and organization of data using mathematical theories and formulas to identify trends, patterns, or relationships among variables.
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