Some Distributions and Their Implications for an Internal Pilot Study With a Univariate Linear Model.

@article{Coffey2000SomeDA,
  title={Some Distributions and Their Implications for an Internal Pilot Study With a Univariate Linear Model.},
  author={Christopher S. Coffey and Keith E. Muller},
  journal={Communications in statistics: theory and methods},
  year={2000},
  volume={29 12}
}
In planning a study, the choice of sample size may depend on a variance value based on speculation or obtained from an earlier study. Scientists may wish to use an internal pilot design to protect themselves against an incorrect choice of variance. Such a design involves collecting a portion of the originally planned sample and using it to produce a new variance estimate. This leads to a new power analysis and increasing or decreasing sample size. For any general linear univariate model, with… CONTINUE READING
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