As a rough guide,investigators generally attempt to achieve statistical power in the range of .05 to .95,depending on the nature of the proposition being investigated.

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Statistical power typically ranges from 0.8 to 0.95, not 0.05 to 0.95. A power of 0.8 or higher is generally considered acceptable for detecting an effect if there is one.

As a Rough Guide,investigators Generally Attempt to Achieve Statistical Power