A two-way ANOVA was carried out to assess the impactof type of farm (government agricultural settlement,established, individual) and tractor maintenance method(preventive, predictive, running, corrective, overhauling,breakdown) on the response variable maintenance practicecontribution. There were two observations for eachcombination of factor levels. The resulting sums ofsquares were SSA 5 35.75 (A 5 type of farm), SSB 5861.20, SSAB 5 603.51, and SSE 5 341.82 (Appraisalof Farm Practice Maintenance and Costs in Nigeria,J. of Quality in Maintenance Engr., 2005: 152168).Assuming both factor effects to be fixed, construct anANOVA table, test for the presence of interaction, andthen test for the presence of main effects for each factor(all using level .01).

Chapter 4 Correlation and Linear Regression I will skip Section 7 (Regression to the Mean) and Section 11 (Nonlinear Relationships). You are responsible for the other sections including the What Can Go Wrong and Ethics sections. Response Variable vs. Explanatory Variable (Factor) --- know what they are Scatter Plot to look at the relationship between Two Quantitative Variables Put the Explanatory...