12.12 Visualizing the ANOVA model. For each of the following settings, draw a picture of the ANOVA model similar to Figure 12.6 (page 652). To sketch the Normal curves, you may want to review the 68–95–99.7 rule on page 57.

  1. (a) μ1 = 17, μ2 = 13, μ3 = 12, and σ = 2.

  2. (b) μ1 = 17, μ2 = 13, μ3 = 12, and σ = 4.

  3. (c) μ1 = 20, μ2 = 12, μ3 = 10, and σ = 3.