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Determine number of observation required

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Contributor
Posts: 34

Determine number of observation required

How to dne whether the number of data required to be taken for a experiment?

eg: I need to take a set of data for the noise mapping, how many should I take ?

Frequent Contributor
Posts: 130

Re: Determine number of observation required

whilst there are heuristic guides for sample size to control for type I or type II error in regression models, logit models, they often assume fairly low levels of covariance amongst potential predictors. I find the guidelines for SEMs - 10 x the number of parameters to be estimated for any single model - to also be a good guideline for generalised mixed models.
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