Study questions
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Repeat the analyses conducted in this case study but using the unlagged instead of the lagged tsetse control codes. Comment.
- Repeat the REML analyses described using CS10Data2. Why do you think the component of variance for animal is zero? Repeat the analysis without animal in the model. Comment.
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Select a few other variables in CS10Data5 that have not been analysed. Carry out the same analyses with GenStat and report your findings in a few sentences.
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In groups of two or three present a Power Pont presentation based on the results of Question 3 to other members of your class. You can divide the talk between yourselves. The other students should discuss your presentation and the suitability of the slides.
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Discuss the choice of 6 months for the average unit of measurement for the statistical analysis. Consider alternatives, such as 1 month, 3 months and 12 months and comment on the advantages and disadvantages of each.
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List the types of data checks that you think should be made each month when the data were originally entered into the data base. One example could be a weight recorded for an individual animal that is much less than measured on previous occasions. Think of others.
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Prepare suitable data sheets to record the data collected in this case study.
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