Answer: An experiment was conducted to determine the

Chapter 13, Problem 45E

(choose chapter or problem)

An experiment was conducted to determine the effect of three methods of soil preparation on the first-year growth of slash pine seedlings. Four locations (state forest lands) were selected, and each location was divided into three plots. Because soil fertility within a location was likely to be more homogeneous than between locations, a randomized block design was employed, using locations as blocks. The methods of soil preparation were A (no preparation), B (light fertilization), and C (burning). Each soil preparation was randomly applied to a plot within each location. On each plot the same number of seedlings was planted, and the observation recorded was the average first-year growth (in centimeters) of the seedlings on each plot. These observations are reproduced in the accompanying table.

a Conduct an ANOVA. Do the data provide sufficient evidence to indicate differences in the mean growth for the three soil preparations?

b Is there evidence to indicate differences in mean growth for the four locations?