1. Explain the objective in two factor ANOVA and the underlying assumptions. Explain formulation of the hypothesis, the sum of squared errors terms, possible test outcomes, main effects and interaction effects.

1. Suppose that a local chapter of sales professionals in the greater San Francisco area conducted a survey of its membership to study the relationship, if any, between the years of experience and salary for individuals employed in inside and outside sales positions. On the survey, respondents were asked to specify one of three levels of years of experience: low (1-10 years), medium (11-20 years), and high (21 or more years).

Table 9

Sunlight Exposure Watering Frequency None Low Medium High Daily 4.8 5 6.4 6.3 4.4 5.2 6.2 6.4 3.2 5.6 4.7 5.6 3.9 4.3 5.5 4.8 4.4 4.8 5.8 5.8 Weekly 4.4 4.9 5.8 6 4.2 5.3 6.2 4.9 3.8 5.7 6.3 4.6 3.7 5.4 6.5 5.6 3.5 4.8 5.5 5.5