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Last modified: May 9, 2003 Printer friendly version : [PDF] [PS] Activity of rats Key words:   Repeated measures. Description To investigate the effect of a certain type of exposure on the activity of rats, the following experiment was carried out. The experimental unit was a cage with two rats. During the entire experimental period the rats were daily exposed to the matter under investigation, in the concentration of 1, 2 or 3 units (treatment 1, 2 and 3, respectively). Once per month during 10 months the activity of the rats was measured by placing the rats from one cage in a chamber in which each intersection of a light beam was counted. Number of observations: 300 Variable                Description treatm 3 treatments: (1, 2 or 3) (concentrations) cage The number of the cage (30 different integers) month Month of the measurement (1,2,...,10) lnc log(count) in 57 hour period Source The Royal Veterinary and Agricultural University, Denmark. Analysis Optimized for Microsoft Internet Explorer 6.0 for Windows webmaster