one-way anova

A brief R tutorial about how to perform a data analysis to compare four treatments data. This is achieved by fitting a analysis of variance model, summarizing and making some nice graphs for the data.  1 Problem You want to investigate the effect of light on plant growth. For this you designed an experiment that includes four different light sources. For each source you placed six plants (you replicate each treatment six times) in chambers with a specific light bulb....