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Last modified: May 9, 2003 Printer friendly version : [PDF] [PS] Growth of guinea pigs Key words:   Repeated measurements Description In an investigation of the effect of vitamin E on the growth of guinea pigs 15 animals were observed for 7 weeks. In week one they were given a growth inhibiting substance. In the beginning of week five they received different amounts of vitamin E (dosage 0,1, or 2). there were five animals in each treatment group, and each animal were weighted at the end of week 1,3,4,5,6, and 7. Number of observations: 90 Variable                Description animal Number of the animal (1-15) week Week of the measurement (1,3,4,5,6,7) weight Weight (g) of the animal dose Dose of vitamin E (0,1,2) Source Crowder, M.J. & Hand, D.J. (1990). Analysis of repeated measures. Chapman & Hall, London. Analysis Various models for repeated measurements Optimized for Microsoft Internet Explorer 6.0 for Windows webmaster