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ANOVA is particularly useful in cases where a researcher might be evaluating the effect of fertilizer rate across several varieties of crop. Here, the researcher is interested in whether varieties differed in response to fertilizer, which will be exposed through a significant interaction term in the ANOVA source table.
Let’s develop an example to see how an ANOVA is done. An experiment in northwest Iowa compared the yield of a corn hybrid planted at three plant densities to determine the optimum planting rate. The data are given in Table 1.
Video example Introduction The oneway command reports one-way ANOVA models. To perform a one-way layout of a variable called endog on exog, type oneway endog exog. Example 1 We run an experiment varying the amount of fertilizer used in growing apple trees. We test four concentrations, using each concentration in three groves of 12 trees each.
2 sie 2019 · In AAB, Abeli et al. employed repeated measures ANOVA with Greenhouse and Geisser correction to study vegetative growth (the numbers of buds, flowers and fruits) of seashore mallow plants (Kosteletzkya pentacarpos) over time, having treated them with different combinations of salt (NaCl) and fertiliser (NPK). de Pedro et al. used a repeated ...
The example analyses cover experiments with a single quantitative level factor, experiments with mixtures of quantitative and qualitative level factors, polynomial regression designs with two quantitative level factors, split-plot designs with quantitative level factors and repeated-measures designs with correlated data and a quantitative treatm...
Exam2.2 Example 2.2 from Experimental Design and Analysis for Tree Im-provement Description Exam2.2 is used to compare two seed lots by using ANOVA under RCB Design.
For example, let’s consider a fertilizer addition experiment, where the growth of some plant species is measured under a fertilizer versus no-fertilizer treatment. Here, the predictor variable (fertilizer addition or not) is a categorical variable.
