Univariate and Multivariate Methods for the Analysis of Repeated Measures Data

Nonfiction, Science & Nature, Mathematics, Statistics
Cover of the book Univariate and Multivariate Methods for the Analysis of Repeated Measures Data by Tony Wragg, GRIN Publishing
View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart
Author: Tony Wragg ISBN: 9783640088041
Publisher: GRIN Publishing Publication: March 9, 2007
Imprint: GRIN Publishing Language: English
Author: Tony Wragg
ISBN: 9783640088041
Publisher: GRIN Publishing
Publication: March 9, 2007
Imprint: GRIN Publishing
Language: English

Thesis (M.A.) from the year 1999 in the subject Statistics, grade: Passed, RMIT, course: MAppSc, language: English, abstract: This thesis considers both univariate and multivariate approaches to the analysis of a set of repeated-measures data. Since repeated measures on the same subject are correlated over time, the usual analysis of variance assumption of independence is often violated. The models in this thesis demonstrate different approaches to the analysis of repeated-measures data, and highlight their advantages and disadvantages. Milk from two groups of lactating cows, one group vaccinated, the other not, was analysed every month after calving for eight months in order to measure the amount of bacteria in the milk. The primary goal of the experiment was to determine if a vaccine developed by the Royal Melbourne Institute of Technology's Biology Department led to a significant decrease in mean bacteria production per litre of milk produced compared to the control group. A univariate model suitable for repeated measures data was initially tried, with mean bacteria production in the treatment group not significantly different from the control group (p < 0.68). The multivariate approach to repeated measures, profile analysis, yielded similar results for treatment effects (p < 0.68), while meeting the necessary assumptions for multivariate analysis. Finally, a generalised multivariate analysis of variance was carried out in order to fit polynomial growth curves for both the control and the vaccinated groups and to test if the growth curves were equal for the two groups. It was found that a slope-intercept model was adequate to describe both growth curves and that the growth curve for the treatment group did not differ significantly from that of the control group (p < 0.11).

View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart

Thesis (M.A.) from the year 1999 in the subject Statistics, grade: Passed, RMIT, course: MAppSc, language: English, abstract: This thesis considers both univariate and multivariate approaches to the analysis of a set of repeated-measures data. Since repeated measures on the same subject are correlated over time, the usual analysis of variance assumption of independence is often violated. The models in this thesis demonstrate different approaches to the analysis of repeated-measures data, and highlight their advantages and disadvantages. Milk from two groups of lactating cows, one group vaccinated, the other not, was analysed every month after calving for eight months in order to measure the amount of bacteria in the milk. The primary goal of the experiment was to determine if a vaccine developed by the Royal Melbourne Institute of Technology's Biology Department led to a significant decrease in mean bacteria production per litre of milk produced compared to the control group. A univariate model suitable for repeated measures data was initially tried, with mean bacteria production in the treatment group not significantly different from the control group (p < 0.68). The multivariate approach to repeated measures, profile analysis, yielded similar results for treatment effects (p < 0.68), while meeting the necessary assumptions for multivariate analysis. Finally, a generalised multivariate analysis of variance was carried out in order to fit polynomial growth curves for both the control and the vaccinated groups and to test if the growth curves were equal for the two groups. It was found that a slope-intercept model was adequate to describe both growth curves and that the growth curve for the treatment group did not differ significantly from that of the control group (p < 0.11).

More books from GRIN Publishing

Cover of the book How to deal with the Stability and Growth Pact - A critical disquisition on the stability tool of the EMU by Tony Wragg
Cover of the book Capital Controls, EMU and the Crisis of the European Monetary System by Tony Wragg
Cover of the book Role and Function of Stock Markets by Tony Wragg
Cover of the book Positioning of Heineken via sport sponsoring in the German beer market by Tony Wragg
Cover of the book On the relationship of comparative literature to 'Strata Poetics' and 'Fundamental Poetics' by Tony Wragg
Cover of the book Sovereign debt default and financial crisis in Argentina 2001 by Tony Wragg
Cover of the book How does the new European chemicals policy REACH affect Bayer Chemicals? by Tony Wragg
Cover of the book A Knight's Tale - A Teaching Unit for the 11th to 13th grade by Tony Wragg
Cover of the book The significance of reading in the English class. A lesson plan with Khaled Hosseini's 'A Thousand Splendid Suns' by Tony Wragg
Cover of the book Hopes and Fears associated with Poland's Accession to the European Union by Tony Wragg
Cover of the book The Pre-Flight Safety Briefing - What are the Reasons for some Passengers' Lack of Attentiveness during Pre-Flight Safety Briefing? by Tony Wragg
Cover of the book Zurückweisung von Beweisanträgen bei Verschleppungsabsicht by Tony Wragg
Cover of the book Melville's 'Moby-Dick, or The Whale' - an Attack on Calvinism by Tony Wragg
Cover of the book Homosexuality as an issue of religion and politics in the USA by Tony Wragg
Cover of the book Virginia Woolf as a Character in Michael Cunningham's THE HOURS by Tony Wragg
We use our own "cookies" and third party cookies to improve services and to see statistical information. By using this website, you agree to our Privacy Policy