Statistics is key to demonstrating the effectiveness of new advancements in science and medicine, but when statistical significance is not achieved, is post-hoc power a valid justification?

Sources

• Journal of Surgical Research article: Is the Power Threshold of 0.8 Applicable to Surgical Science?—Empowering the Underpowered Study

• RetractionWatch: Statisticians Clamor for Retraction of Paper by Harvard Researchers

• Blogpost: Observed power, and what to do if your editor asks for post-hoc power analyses

• Blogpost: Calculating Observed Power Is Just Transforming Noise