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Carry-over and interaction effects of different hand-milking techniques and milkers on milk
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Statistics.
1986 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The main idea of this thesis is studying the importance of the carry-over effects and interaction effects in statistical models. To investigate it, a hand-milking experiment in Burkina Faso was studied. In many no electricity access countries, such as Burkina Faso, the amount of milk and milk compositions are still highly  relying on hand-milking techniques and milkers. Moreover, the time effects also plays a important role in stockbreeding system. Therefore, falling all effects, carry-over effects and interaction effects into a linear mixed effects model, it is concluded that the carry-over effects of milker and hand-milking techniques cannot be neglected, and the interaction effects among hand-milking techniques, different milkers, days and periods can be substantial. 

Place, publisher, year, edition, pages
1986. , 26 p.
Keyword [en]
Carry-over effect, Interaction effect, Linear mixed effects model, Fixed effects, Random effects, Hand-milking, Milker, Milk composition.
National Category
Probability Theory and Statistics
URN: urn:nbn:se:uu:diva-154641OAI: diva2:421336
Subject / course
Educational program
Master Programme in Statistics
Social and Behavioural Science, Law
Available from: 2011-06-10 Created: 2011-06-08 Last updated: 2011-06-10Bibliographically approved

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