=+43. Tax return forms. In order to improve the format of tax return forms, a government agency developed two new forms. To determine which, if any, are superior to the current form, 30 individuals were asked to participate in an experiment. Each of the two new forms and the current one were filled out by 10 people. The amount of time (in minutes) taken by each person to complete that task was recorded. A partially complete Analysis of Variance table of the data follows.

Source of Variation SS df MS F Treatment 6421.4 Residual 30423.8 Total 36845.2