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Statistical resources

We have a comprehensive training manual which illustrates statistical methodology with an agricultural and environmental focus. An undergraduate knowledge of basic statistics is all you need to follow the manual, which takes you through design and analysis of experiments using the current version of GenStat.

 

GenStat Resources. Right-click to save, left-click to open:

Training manual on ANOVA & REML last corrected 14 Feb 2011
4.0 MB pdf
Training manual on Regression and Generalized Linear Models
2.0 MB pdf
Datsets for ANOVA & REML manual
250 KB xls
Datsets for Regression and GLM manual
50 KB xls

Other Resources:

Agronomy Journal Statistical Analysis of Field Trials with Changing Treatment Variance. Co-authored with Curt Lee, Agro-Tech Inc, North Dakota, USA.

In-house paper

146 KB pdf Uses ANOVA on data from a field trial, examines the residuals and identifies a trend running through the blocks, then re-analyses the data using Linear Mixed Models (REML). Co-authored with Curt Lee, Agro-Tech Inc, North Dakota, USA.
In-house paper 644 KB pdf Compares a standard split-block analysis of an agricultural field experiment with a spatial analysis using Linear Mixed Models (REML). Co-authored with Curt Lee, Agro-Tech Inc, North Dakota, USA.

Power & sample size (2003 format)

Power and sample size (2007 format)

0.5 MB xls

200 KB xlsm

Calculates power and/or required sample size for an experiment (see Mick O'Neill & Peter Thomson in Australian Journal of Experimental Agriculture, 1998, 38 617-22; macro updated by Maryann O'Donnell, 2004.
   

Template (2003 format)

Template (2007 format)

284 KB xls

100 KB xlsm

Excel file, uses Solver and maximum likelihood to fit an inverse normal distribution to the time to seed germination.
REML for a simple dataset 0.5 MB xls Uses Excel to demonstrate the difference between Maximum Likelihood and Residual Maximum Likelihood estimates for a simple set of data from a normal population.
Technical report 1 233 KB pdf Technical report on fitting an inverse normal distribution.
Technical report 2 382 KB pdf Technical report on the exact and approximate distributions of Levene’s mean-based test
CRD 845 KB zipped xls Zipped file with moments of Levene's median-based test for a completely randomised design.
general 45 KB zipped xls Zipped file with data for 3 examples and tables of multipliers to convert ordinary least squares Levene's test to weighted least squares test for general balanced designs.

 

 

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