Cost Accounting: I'm having trouble finding 7, and I do not fully understand in order to answer 5.

Use Excel to regress Manufacturing Overhead on Activity Driver 1 and Activity Driver 2. Label your new tab "Model 1". Use Excel to regress Manufacturing Overhead on Activity Driver 1. Label your new tab "Model 2". Use Excel to regress Manufacturing Overhead on Activity Driver 2. Label your new tab "Model 3". Which is the best model? Why? Make sure to write out the regression equation for the best model. Model. In step 4, you selected the best model. Now use your statistical output to interpret this model? If Activity Driver 1 = 525 and Activity Driver 2 = 3, 100, what is the expected Maintenance & Repairs? Build a 90% Confidence Interval for the expected Maintenance & Repairs