Question: The figure at the top of the page is based

The figure at the top of the page is based on data from the article “Root and Shoot Competition Intensity Along a Soil Depth Gradient” (Ecology [1995]: 673– 682). It shows the relationship between aboveground biomass and soil depth within the experimental plots. The relationship is described by the estimated regression equation: biomass = 29.85 1 25.29(soil depth) and r2 = .65; P < 0.001; n = 55. Do you think the simple linear regression model is appropriate here? Explain. What would you expect to see in a plot of the standardized residuals versus x?

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  • CreatedSeptember 19, 2015
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