Question: The file grasses.sav contains data on the yield (growth) of five grass varieties selected at random from several hundred. The three varieties were treated with three different seed promotion methods.

j. (5 points) Are Variety and (seed promotion) Method fixed or random factors? What type of ANOVA model (I-III) should be used to analyze the yield data?

k. (5 points) Analyze the data using the model you selected in part a. Report and intrepret the ANOVA table from SPSS in your results.

l. (5 points) Generate a profile plot (i.e. like figure 12.2) using SPSS and interpret the results.