A researcher suspects that the effectiveness of the different strategies for lowering the amount of salt intake is affected by the education level of the subjects. Therefore, she used a 6 X 4 factorial design with three replicates in each cell to examine her conjecture. The data is summarized in the following table. Strategies Strategy 1 Strategy 2 Strategy 4 Strategy 6 2.9 3.2 3.0 Less than High School 2.5 2.7 3.2 2.6 2.3 2.3 2.9 3.1 3.0 2.6 2.9 2.8 3.0 2.9 2.6 Education Level 2.7 2.9 2.4 2.8 2.1 2.3 2.9 2.5 2.5 2.7 2.8 2.2 2.5 2.7 2.3 2.4 2.3 2.4 2.7 2.4 2.5 2.9 2.6 2.2 2.4 2.3 2.1 2.4 2.9 2.5 2.5 2.3 2.1 2.7 2.4 2.0 2.5 2.2 2.4 2.4 2.3 1.9 2.7 2.6 2.5 2.5 2.2 1.9 2.3 2.1 1.7 2.0 2.0 1.4