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Each dataset has multiple observations about each category of the independent variable considered as individual (number of surveys, two in our case).
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This thread is aimed at users who have multiple observations covering the same area of sky.
The benefit of having multiple observations (panel data) on the same units allows controlling for unobserved heterogeneous characteristics of hospitals.
For satellite telemetry datasets, the number of animals per record was always one even though one individual tag may have multiple observations each with a different location, depending on how often data were recorded and published.
3 The random effects part was chosen to handle the fact that some patients had multiple observations.
In case that one patient had multiple observations in one of the 11 periods, the mean value was calculated.
You would have multiple observations, so that everybody would be feeding back about me to somebody else, albeit anonymously".
However, adopting the recommendation made by Eva and his collaborator [ 4] of having multiple observations within a unit may not always be feasible for a program.
The sample used here is a patient dataset (described below) where respondents are included each time they are treated, and hence some respondents have multiple observations.
Interestingly, the same results as Hebert and Bravo [ 5] were achieved using a shorter form (4 items vs. the initial 44-item form), suggesting that it is more important to have multiple observations than longer forms.
Dirt scores had multiple observations and were analysed using repeated measures ANOVA (MIXED procedure of SAS 9.3) with terms for slat, mat, wood-chip, time and their interactions included in the model.
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