Power analysis and practical strategies for environmental monitoring.

@article{Green1989PowerAA,
  title={Power analysis and practical strategies for environmental monitoring.},
  author={Roger H Green},
  journal={Environmental research},
  year={1989},
  volume={50 1},
  pages={195-205}
}
What sample size n is needed to have 1 - beta chance of detecting a magnitude delta response to pollution impact? A design where the same sites are sampled both before and after impact is more efficient than a design where sites are reallocated for the after-impact sampling. Taylor's Power Law can be used to estimate the n necessary to achieve specified power for a wide range of variance-mean relationships. Solutions can easily be obtained where the error coefficient of variation and the… CONTINUE READING